Rich command: Context + Restore

[cinqmilleans]

Resolved / Related Issues
This pr adds the first and main context used by actions. A context is an observable service that easily provides actions with properties that are difficult to know. To observe properties of the current page, you must notify the properties when it changes or when a parent or ancestor object changes.

• Added ContentPageContext. The data is always from the current page. Selected items are easily notified (whether it's a selection or a page change).
• Added RestoreRecycleBin and RestoreAllRecycleBin commands.
• Improved EmptyRecycleBin with context.

Validation
How did you test these changes?

• Built and ran the app
• Tested the changes for accessibility

[cinqmilleans]

I updated to resolve an incompatibility with the latest commits. This forced me to integrate the management of OpacityIcon

• RichGlyph can be of type OpacityIcon
• ColoredIcon is removed.
• Restore(All) uses OpacityIcon.
• Added ContextMenuFlyoutItemViewModelBuilder. This new class avoids having to read the properties of the command when it is not displayed in the menu, to improve performance.

When all the commands have been converted, it will be possible to replace ContextMenuFlyoutItemViewModel with an interface and 3 implementations to improve code and performance.

Known bug: In the context menu, the Restore entry of a RecycleBin item has no icon. However, the element does have an OpacityIcon content. I don't think the bug is related to this code.

[yaira2]

Known bug: In the context menu, the Restore entry of a RecycleBin item has no icon. However, the element does have an OpacityIcon content. I don't think the bug is related to this code.

I noticed this as well, I think we can leave as is for now (same issue in main)

[yaira2]

LGTM