Add a tutorial for enabling shell integration

[zadjii-msft]

Basically, the blog post

[learn-build-service-prod[bot]]

Learn Build status updates of commit a148bb7:

:warning: Validation status: warnings

File	Status	Preview URL	Details
TerminalDocs/tutorials/shell-integration.md	:warning:Warning	View	Details

TerminalDocs/tutorials/shell-integration.md

• Line 160, Column 1: [Warning: alt-text-missing - See documentation] Missing alternate text for image 'https://learn.microsoft.com/en-us/windows/terminal/images/duplicate-tab-same-cwd.gif'. Alt text is required for accessibility.
• Line 160, Column 1: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/windows/terminal/images/duplicate-tab-same-cwd.gif' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 160, Column 1: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/windows/terminal/images/duplicate-tab-same-cwd.gif' will be broken in isolated environments. Replace with a relative link.

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[learn-build-service-prod[bot]]

Learn Build status updates of commit 3b1c528:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
TerminalDocs/tutorials/shell-integration.md	:white_check_mark:Succeeded	View

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