Add WinGet installation commands to start-here.md

[beth-panx]

Added installation instructions for WinGet in the documentation when WinGet is not immediately available.

[prmerger-automator]

@beth-panx : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 565ed16:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
hub/apps/get-started/start-here.md	⚠️Warning		Details

hub/apps/get-started/start-here.md

• Line 34, Column 116: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/windows/package-manager/winget/' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 34, Column 116: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/windows/package-manager/winget/' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[beth-panx]

@jwmsft updated the locale part in the link. Not sure how to handle relative link vs. what I have. Feel free to edit if it's easier.

[learn-build-service-prod]

Learn Build status updates of commit 75a7e9a:

💡 Validation status: suggestions

File	Status	Preview URL	Details
hub/apps/get-started/start-here.md	💡Suggestion		Details

hub/apps/get-started/start-here.md

• Line 34, Column 116: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/windows/package-manager/winget/' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[learn-build-service-prod]

Learn Build status updates of commit 1a78ded:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
hub/apps/get-started/start-here.md	⚠️Warning		Details

hub/apps/get-started/start-here.md

• Line 34, Column 116: [Warning: file-not-found - See documentation] Invalid file link: '../../package-manager/winget/'.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[learn-build-service-prod]

Learn Build status updates of commit ddcd38e:

✅ Validation status: passed

File	Status	Preview URL	Details
hub/apps/get-started/start-here.md	✅Succeeded

For more details, please refer to the build report.