Added AlwaysOnTop icon to vcx project and referenced in base rc

[ckirby19]

Summary of the Pull Request

Added .ico and resource references so that AlwaysOnTop exe has an icon

PR Checklist

• [X] Closes: #15280
• [X] 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

Icon as shown in task manager before adding .ico and resource reference:

Icon as shown in task manager after: