Fixes #9035 - Add Alt keybinings for new case commands

[sdwheeler]

PR Summary

Fixes #9035 - Add Alt keybinings for new case commands

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[opbld31]

Docs Build status updates of commit 6495841:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.3/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.3)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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[opbld33]

Docs Build status updates of commit 756f0e6:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.3/PSReadLine/About/about_PSReadLine_Functions.md	✅Succeeded	View (powershell-7.3)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel