[Settings] Optimizing and cleaning up code

[niels9001]

Summary of the Pull Request

• Removing dead experiments code
• Refactoring and simplifying OOBE/SCOOBE windowing code
• Removing dead assets
• Optimizing CmdPal assets to lower res shaving off a few MBs
• Should be merged after: "What's new" improvements #44638

PR Checklist

• Closes: #xxx

• 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

Validation Steps Performed

[Jay-o-Way]

I like these numbers, ghehe 😏