Save and Reload multiple tabs (Like a profile)

[abhay-ind]

Description of the new feature/enhancement

When developing an application, we need to run multiple servers simultaneously. The multiple tabs support is excellent, but re-running it again and again is monotonous. If a set of new tabs can be loaded on clicking on "Work" profile, then it will make the life easier for the developer. Much similar to collection feature of Postman.

Proposed technical implementation details (optional)

The first command to be executed on each tab needs to be provided while making the "Work" profile.

[zadjii-msft]

Usually, I'd give a spiel about how this is related to #1571. Though, with #766, #756, #3992 all merged now, we should probably add an action to actually allow saving the layout.

There's kinda two ways this could be done:

• the action pops up a ContentDialog with the json needed to restore this layout. You can then copy-paste that into your settings if you so choose.
• The action pops up a ContentDialog with a text box to name the action, and then save it to your commands with that name? We can't do this IIRC, since ContentDialog's can't have an editable text box in Xaml Islands 😢
• The action saves the layout as a command Open my tab layout({++N}) (with the autoincrementing N). This would go straight to the command palette, not to the new tab menu.