Triggering the merge process manually

[witcher112]

If we would like to consider #109 I think it would require an option to trigger the merge process manually. It could be done simply by exposing it through contribution commands.

I propose the name Merge workspace configuration.

As before, I can take a look at it :)

[calebcartwright]

I don't have any objections to adding this if you're willing to work on it. I do think the value proposition is relatively minimal, but can see a minor convenience, even in the absence of #109, in a scenario where a user has made a mistake in a native file like settings.json and just wants to clean/fix everything up, without having to modify the shared/local files