[CmdPal] Extension string updates

[niels9001]

Summary of the Pull Request

Feedback from the design team:

• Reduce any redundant or long text strings for better readability and localization
• Verb + noun for most extensions
• Sentence casing according to the Windows Writing Guidelines

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

[jiripolasek]

@niels9001 I don't see any changes in the .designer.cs files generated for the .resx file (except the one from a066842). However, the corresponding changes should be committed for every RESX; otherwise, Visual Studio will regenerate them later and force them into other commits.

[niels9001]

@niels9001 I don't see any changes in the .designer.cs files generated for the .resx file (except the one from a066842). However, the corresponding changes should be committed for every RESX; otherwise, Visual Studio will regenerate them later and force them into other commits.

Oops, I was skipping those thinking those would were auto-generated. What's your suggestion I do :)?

[jiripolasek]

@niels9001 Open the files in big Visual Studio and open each modified .RESX file, or right-click on the file in the Solution Explorer and select "Run Custom Tool" from the context menu.

It can be also done by resgen CLI command, but there's caveat about visibility of the generated class (public vs internal) as resgen needs an explicit switch and I'm not sure if CmdPal is using one consistently.