Support json5

[magnus-bb]

First off, thank you for this cool extension - it helps me create reusable development environments across projects very nicely 😊

To make it easier to maintain my VSCode settings, I would love to be able to write comments in my extendable settings file, but at the moment, I can only point tabaqa.json at a regular json-file.

By using something like a json5 parser instead of the standard JSON.parse, this should be possible. This would also give the added benefit of allowing users to be a bit more flexible when writing their configs.

[abdul-alhasany]

I think this is a great idea. I will hopefully implement it but I can not promise anything soon.
I will leave this issue opened until it is implements.