[KeyboardManager] Fix shift on numpad

[mantaionut]

Summary of the Pull Request

Fix using a numpad key as shift.

PR Checklist

• Closes: PowerToys Keyboard Manager Shift problem. (sticking) #22346
• 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

When receiving a numpad specific key, check if there is the numpad lock key with the same scan code that is overwriting shift and if it does, we overwrite the original key with the numpad key. I do this because when using for example numpad1 as shift we get the following scenario:

• Press numpad1 -> we get in the Windows hook event key pressed for numpad1, then send shift
• We get shift pressed, we ignore this event
• We get shift release, we ignore this event
• We get numpad end button instead of numpad1 release since shift was also pressed.

Validation Steps Performed

Replace numpad 1 with shift. Check that when releasing numpad1 shift gets toggled off.

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