Add documentation for Drag and drop delimiter to advanced profile settings

[Vallabh-1504]

Description

This PR adds documentation for newly added Drag and drop delimiter setting to profile-advanced.md.
Includes the demo gif.

Related PR

the feature implemented and merged in: microsoft/terminal#19799

[learn-build-service-prod]

Learn Build status updates of commit f4db1c0:

✅ Validation status: passed

File	Status	Preview URL	Details
TerminalDocs/customize-settings/profile-advanced.md	✅Succeeded	View
TerminalDocs/images/drag-and-drop-delimiter.gif	✅Succeeded	View

For more details, please refer to the build report.

[learn-build-service-prod]

PoliCheck Scan Report

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[Vallabh-1504]

Hi @carlos-zamora, I finally had some time to loop back and add the documentation for the drag-and-drop delimiter feature we merged a while back in microsoft/terminal#19799. Let me know if this looks good or if you need any adjustments!