[Workspaces] implement standalone app handling

[donlaci]

Summary of the Pull Request

extending the snapshot tool to catch standalone apps.
Also modifying the launcher to launch standalone apps

PR Checklist

• Closes: Workspaces does not capture .NET winforms applications #34681
• Communication: I've discussed this with core contributors already. If 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