Planning, evaluating and tracking stable 8.2 release

# Background

Windows Community Toolkit 8.2 is slated to release soon, with 8.2-preview2 already in flight.

# Problem

To facilitate a smooth release, we need to:
- Do a full planning assessment for steps needed to finalize the release.
- File, track, evaluate and complete all associated work.

# Solution

Tracking creation and completion of individual tasks for the 8.2 release.
- Create comprehensive release notes
- Draft and publish blog post
- Update https://toolkitlabs.dev/
- Update Uno if needed
- Verify if SettingsExpander and TabbedView are fixed as per https://github.com/CommunityToolkit/Windows/issues/393#issuecomment-2428036162
- Verify no unexpected functional issues throughout the wasm gallery
- Update published native app
- Release refactored and improved documentation