This adds the UI plus all necessary models and signal handling to render
discord import progress in the desktop application.
It also introduces message handling for discord chat message types.
Requires status-im/status-go#2826 to function
Co-authored with @caybro
Renamed setting section "Language" to "Language & Currency".
Updated link to StatusQ - Needed new `StatusListPicker` component.
Added language model in `LanguageStore` and created first view approach for `Language` setting.
Added temporal confirmation dialog for Linux OS (since it is currently needed to restart the app to apply changes).
Removed no longer used files.
Closes#5384