Add window positioning and sizing with Alt+mouse button

[foxmsft]

Summary of the Pull Request

This adds a new toy, WinPos, that allows dragging (left click) or resizing (right click) of windows while the Alt key is pressed.

PR Checklist

• Closes: Alt+Drag or Windows+Drag to move windows #269

• Communication: I've discussed this with core contributors already. If the work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end-user-facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

There are some things to look into:

• THROTTLE_INTERVAL_MS shouldn't be necessary, it's there as a stopgap for performance. Maybe the GetTickCount() 10/16 ms resolution is the issue.
  • Made the position change async.
• Add configuration for the overlay color and opacity.
• Add configuration for the size & geometry text.
• Automatically detect games (maybe for from Game Bar).
• Improve the handling (absorption and replay) of the Alt key.
• Configure the keyboard modifiers (Alt, Win, Shift, any combination of...).

Validation Steps Performed