Add extension profiles

[rickstaa]

#15611 gives users the option to disable and enable specific extensions for a given workspace. This feature is excellent, but I think it can be improved even further with extension profiles. An extension profile is a particular set of extensions that are enabled when this profile is set in your vscode settings.json file:

{
    "extensions.profile": "CPP",
}

Users would then be able to add extensions to a profile and enable these sets for specific workspaces.

[gjsjohnmurray]

/duplicate

See #116740, #40239, #39272

[rickstaa]

@gjsjohnmurray Thanks I missed those.

[g13013]

coupled with #137091 it would be awesome !