Add ISE Mode to ISE -> VSCode doc

[TylerLeonhardt]

PR Summary

This documents the "PowerShell: Enable ISE Mode" feature in the vscode extension that simplifies the VSCode UI automatically.

PR Context

This feature needed to be documented. The feature PR added to the extension is here: PowerShell/vscode-powershell#2335

Select the type(s) of documents being changed.

Cmdlet reference & about_ topics

• Version 7.x preview content
• Version 7.0 content
• Version 6 content
• Version 5.1 content

Conceptual articles

• Fundamental conceptual articles
• Script sample articles
• DSC articles
• Gallery articles
• JEA articles
• WMF articles
• SDK articles

PR Checklist

• I have read the contributors guide and followed the style and process guidelines
• PR has a meaningful title
• PR is targeted at the staging branch
• All relevant versions updated
• Includes content related to issues and PRs - see Closing issues using keywords.
• This PR is ready to merge and is not Work in Progress
  • If the PR is work in progress, please add the prefix WIP: or [ WIP ] to the beginning of the
    title and remove the prefix when the PR is ready.

[TylerLeonhardt]

cc Rob Holt (@rjmholt) Sydney Smith (@SydneyhSmith)

[opbld34]

Docs Build status updates of commit b985b96:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/components/vscode/How-To-Replicate-the-ISE-Experience-In-VSCode.md	✅Succeeded	View (powershell-3.0) View (powershell-4.0) View (powershell-5.0) View (powershell-5.1) View (powershell-6) View (powershell-7) View (powershell-7.x)
reference/docs-conceptual/components/vscode/images/How-To-Replicate-the-ISE-Experience-In-VSCode/3-ise-mode.png	✅Succeeded	View (powershell-3.0) View (powershell-4.0) View (powershell-5.0) View (powershell-5.1) View (powershell-6) View (powershell-7) View (powershell-7.x)

For more details, please refer to the build report.

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