Created new view to be used when a community needs permissions to join:
- Left panel blur layout created.
- Header panel blur layout created.
- Central panel blur layout created.
- Join permission overlay panel integrated.
Closes#9267
- Created `CommunityPermissionsView` and integrated into the flow.
- Created `PermissionItem` component.
- Added `holdingsListModel`, `permissionsObjectModel` and `channelsListModel` flows with mocked data.
- Added `isPrivate` permission property.
- Added button header in `SettingsPageLayout`
- Added signals/methods for edit/duplicate/remove permissions
- Created new file `OperatorsUtils.qml` specific for `Operators`
Noelia