APPBAR: Add notification when resource shared to user

[jesscmoore]

Description

As a user, potentially with many shared notes, I would like to know when someone has shared a note file with me. This would be a notification action that is triggered when a permission is granted from within SolidUi.

If it is to intergrate with device notifications, then it will have platform dependencies, and may require different entitlements in macos/ios/android etc.

If possible in the same issue, it should also update their Solid settings to add a notification section to the settings window and show the type of notification that is implemented.

Why

So that as a user I know the note is available and can access it.

Closing Criteria

Checklist for closing the issue:

• No errors from make prep
• All tests pass make qtest
• User is notified when note is shared to them

[tonypioneer]

The following is a notification sending test tool in SolidUI Example App. There is a notification icon on the AppBar with a badge showing the number of unread notifications. SolidUI will check whether there are any new notifications every 30 seconds.

This is a screenshot of the notification centre. The exclamation mark and the down arrow mean the priority of the notification. The red dot means the notification is unread. The items can be sorted by sender or time. Users can also select how many notifications could be shown on one page.

[tonypioneer]

The following are the screenshots of the notification centre on NotePod app.

[jesscmoore]

Reopening - as closed by accident - PR is in review