Adding language support for JS/TS via typescript-language-server

[themichaelusa]

This is still a work in progress, but should be ready to go in no more than a day.

TODOs:

• Revert changes to pyproject.toml
• Remove junk files from my fork (todo.txt, tests_js, etc)
• Proper tests for JS/TS integration under multilspy/tests
• Some code styling nits + comments where needed
• Revert event loop changes (these are for a separate PR - assuming I can replicate hanging behavior w/ SyncLanguageServer)

[themichaelusa]

@microsoft-github-policy-service agree company="Rubrick, Inc."

[mrT23]

I think i solved the problem described here:
#5 (comment)

see attached file:
initialize_params.json

I basically removed the window section from the capabilities. I don't think it is needed for our API usage, and it causes the stuck problem