Add Documentation for New PSReadLine Option ViClipboardMode

[WestRyanK]

PR Summary

This change adds documentation for the ViClipboardMode option being added to PSReadLine. Specifically, it updates the Get-PSReadLineOption.md and Set-PSReadLineOption.md for version 7.4 of PSReadLine. In these files it documents the usage of the command parameter -ViClipboardMode.

This is the associated PR:

• [vi-mode] Add ViClipboardMode Option to Support Copying and Pasting to System Clipboard PowerShell/PSReadLine#3769

When ViClipboardMode is set to SystemClipboard, copying and pasting will utilize the system's clipboard instead of a local clipboard while in Vi mode in PSReadLine. Using the system clipboard allows text to be copied and pasted between applications, terminal windows, and panes while in VI mode.

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.

[github-actions]

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[learn-build-service-prod]

Learn Build status updates of commit 8a8482c:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.4/PSReadLine/Get-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)
reference/7.4/PSReadLine/Set-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit bb59fc7:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.4/PSReadLine/Get-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)
reference/7.4/PSReadLine/Set-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 1b5f137:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.4/PSReadLine/Get-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)
reference/7.4/PSReadLine/Set-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 5a54b78:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.4/PSReadLine/Get-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)
reference/7.4/PSReadLine/Set-PSReadLineOption.md	✅Succeeded	View (powershell-7.4)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[sdwheeler]

The code PR is stalled and subject to change. Closing this docs PR for now. Can reopen if code PR updates.