feat: introduce theming capability

This commit introduces the theming story discussed in #3.
Once this lands, we'll have a new namespace `StatusQ.Core.Theme` which
can be used as follows:

```qml
import StatusQ.Core.Theme

StatusLightTheme {}
StatusDarkTheme {}

Theme.palette.[SOME_THEME_PROP] // as spec'ed in #3
```

Closes #3

src/StatusQ/Core/Theme/StatusColors.qml

@@ -0,0 +1,65 @@
+pragma Singleton
+import QtQuick 2.13
+
+QtObject {
+
+    property var colors: {
+
+        'black': '#000000',
+        'white': '#FFFFFF',
+
+        'blue': '#4360DF',
+        'blue2': '#2946C4',
+        'blue3': '#88B0FF',
+        'blue4': '#869EFF',
+        'blue5': '#AAC6FF',
+
+        'brown': '#8B3131',
+        'brown2': '#9B832F',
+        'brown3': '#AD4343',
+
+        'cyan': '#51D0F0',
+
+        'graphite': '#212121',
+        'graphite2': '#252525',
+        'graphite3': '#2C2C2C',
+        'graphite4': '#373737',
+        'graphite5': '#909090',
+        
+        'green': '#4EBC60',
+        'green2': '#7CDA00',
+        'green3': '#60C370',
+        'green4': '#93DB33',
+
+        'grey': '#F0F2F5',
+        'grey2': '#F6F8FA',
+        'grey3': '#E9EDF1',
+        'grey4': '#EEF2F5',
+        'grey5': '#939BA1',
+
+        'moss': '#26A69A',
+        'moss2': '#10A88E',
+
+        'orange': '#FE8F59',
+        'orange2': '#FF9F0F',
+        'orange3': '#FFA67B',
+        'orange4': '#FE8F59',
+
+        'purple': '#887AF9',
+
+        'red': '#FF2D55',
+        'red2': '#FA6565',
+        'red3': '#FF5C7B',
+
+        'turquoise': '#0DA4C9',
+        'turquoise2': '#07BCE9',
+        'turquoise3': '#7BE5FF',
+        'turquoise4': '#0DA4C9',
+
+        'violet': '#D37EF4',
+
+        'yellow': '#FFCA0F',
+        'yellow2': '#EAD27B'
+    }
+}
+

src/StatusQ/Core/Theme/StatusDarkTheme.qml

@@ -0,0 +1,64 @@
+import QtQuick 2.13
+
+ThemePalette {
+
+    property QtObject baseFont: FontLoader {
+        source: "../../../assets/fonts/Inter/Inter-Regular.otf"
+    }
+
+    property QtObject monoFont: FontLoader {
+        source: "../../../assets/fonts/InterStatus/InterStatus-Regular.otf"
+    }
+
+    baseColor1: getColor('graphite5')
+    baseColor2: getColor('graphite4')
+    baseColor3: getColor('graphite3')
+    baseColor4: getColor('graphite2')
+    baseColor5: getColor('graphite')
+
+    primaryColor1: getColor('blue3')
+    primaryColor2: getColor('blue4', 0.3)
+    primaryColor3: getColor('blue4', 0.2)
+
+    dangerColor1: getColor('red3')
+    dangerColor2: getColor('red3', 0.3)
+    dangerColor3: getColor('red3', 0.2)
+
+    successColor1: getColor('green3')
+    successColor2: getColor('green3', 0.2)
+
+    mentionColor1: getColor('turquoise3')
+    mentionColor2: getColor('turquoise4', 0.3)
+    mentionColor3: getColor('turquoise4', 0.2)
+    mentionColor4: getColor('turquoise4', 0.1)
+
+    pinColor1: getColor('orange3')
+    pinColor2: getColor('orange4', 0.2)
+    pinColor3: getColor('orange4', 0.1)
+
+    directColor1: getColor('white')
+    directColor2: getColor('white', 0.9)
+    directColor3: getColor('white', 0.8)
+    directColor4: getColor('white', 0.7)
+    directColor5: getColor('white', 0.4)
+    directColor6: getColor('white', 0.2)
+    directColor7: getColor('white', 0.1)
+    directColor8: getColor('white', 0.05)
+
+    indirectColor1: getColor('black')
+    indirectColor2: getColor('black', 0.7)
+    indirectColor3: getColor('black', 0.4)
+
+    miscColor1: getColor('blue5')
+    miscColor2: getColor('purple')
+    miscColor3: getColor('cyan')
+    miscColor4: getColor('violet')
+    miscColor5: getColor('red2')
+    miscColor6: getColor('orange')
+    miscColor7: getColor('yellow')
+    miscColor8: getColor('green4')
+    miscColor9: getColor('moss2')
+    miscColor10: getColor('brown3')
+    miscColor11: getColor('yellow2')
+}
+

src/StatusQ/Core/Theme/StatusLightTheme.qml

@@ -0,0 +1,64 @@
+import QtQuick 2.13
+
+ThemePalette {
+
+    property QtObject baseFont: FontLoader {
+        source: "../../../assets/fonts/Inter/Inter-Regular.otf"
+    }
+
+    property QtObject monoFont: FontLoader {
+        source: "../../../assets/fonts/InterStatus/InterStatus-Regular.otf"
+    }
+
+    baseColor1: getColor('grey5')
+    baseColor2: getColor('grey4')
+    baseColor3: getColor('grey3')
+    baseColor4: getColor('grey2')
+    baseColor5: getColor('grey')
+
+    primaryColor1: getColor('blue')
+    primaryColor2: getColor('blue', 0.2)
+    primaryColor3: getColor('blue', 0.1)
+
+    dangerColor1: getColor('red')
+    dangerColor2: getColor('red', 0.2)
+    dangerColor3: getColor('red', 0.1)
+
+    successColor1: getColor('green')
+    successColor2: getColor('green', 0.1)
+
+    mentionColor1: getColor('turquoise')
+    mentionColor2: getColor('turquoise2', 0.3)
+    mentionColor3: getColor('turquoise2', 0.2)
+    mentionColor4: getColor('turquoise2', 0.1)
+
+    pinColor1: getColor('orange')
+    pinColor2: getColor('orange2', 0.2)
+    pinColor3: getColor('orange2', 0.1)
+
+    directColor1: getColor('black')
+    directColor2: getColor('black', 0.9)
+    directColor3: getColor('black', 0.8)
+    directColor4: getColor('black', 0.7)
+    directColor5: getColor('black', 0.4)
+    directColor6: getColor('black', 0.3)
+    directColor7: getColor('black', 0.1)
+    directColor8: getColor('black', 0.05)
+
+    indirectColor1: getColor('white')
+    indirectColor2: getColor('white', 0.7)
+    indirectColor3: getColor('white', 0.4)
+
+    miscColor1: getColor('blue2')
+    miscColor2: getColor('purple')
+    miscColor3: getColor('cyan')
+    miscColor4: getColor('violet')
+    miscColor5: getColor('red2')
+    miscColor6: getColor('orange')
+    miscColor7: getColor('yellow')
+    miscColor8: getColor('green2')
+    miscColor9: getColor('moss')
+    miscColor10: getColor('brown')
+    miscColor11: getColor('brown2')
+}
+

src/StatusQ/Core/Theme/Theme.qml

@@ -0,0 +1,14 @@
+pragma Singleton
+
+import QtQuick 2.13
+
+QtObject {
+    id: appTheme
+    property ThemePalette palette: StatusLightTheme {}
+
+    function setTheme(theme) {
+        palette = theme
+    }
+}
+
+

src/StatusQ/Core/Theme/ThemePalette.qml

@@ -0,0 +1,71 @@
+import QtQuick 2.13
+
+QtObject {
+    
+    id: theme
+
+    property QtObject baseFont
+    property QtObject monoFont
+
+    property color baseColor1
+    property color baseColor2
+    property color baseColor3
+    property color baseColor4
+    property color baseColor5
+
+    property color primaryColor1
+    property color primaryColor2
+    property color primaryColor3
+
+    property color dangerColor1
+    property color dangerColor2
+    property color dangerColor3
+
+    property color successColor1
+    property color successColor2
+
+    property color mentionColor1
+    property color mentionColor2
+    property color mentionColor3
+    property color mentionColor4
+
+    property color pinColor1
+    property color pinColor2
+    property color pinColor3
+
+    property color directColor1
+    property color directColor2
+    property color directColor3
+    property color directColor4
+    property color directColor5
+    property color directColor6
+    property color directColor7
+    property color directColor8
+
+    property color indirectColor1
+    property color indirectColor2
+    property color indirectColor3
+
+    property color miscColor1
+    property color miscColor2
+    property color miscColor3
+    property color miscColor4
+    property color miscColor5
+    property color miscColor6
+    property color miscColor7
+    property color miscColor8
+    property color miscColor9
+    property color miscColor10
+    property color miscColor11
+
+    function alphaColor(color, alpha) {
+        let actualColor = Qt.darker(color, 1)
+        actualColor.a = alpha
+        return actualColor
+    }
+
+    function getColor(name, alpha) {
+        return !!alpha ? alphaColor(StatusColors.colors[name], alpha) : StatusColors.colors[name]
+    }
+}
+

src/StatusQ/Core/Theme/qmldir

@@ -0,0 +1,6 @@
+singleton StatusColors 0.1 StatusColors.qml
+ThemePalette 0.1 ThemePalette.qml
+StatusLightTheme 0.1 StatusLightTheme.qml
+StatusDarkTheme 0.1 StatusDarkTheme.qml
+singleton Theme 0.1 Theme.qml
+