investigate LSP as alternative for code indexing and searching

OK I figured out how to use LSPs.

For anyone still interested, here's a demo: https://gist.github.com/sansmoraxz/374776fd6a10eaf870cdd1fdba96e08f

I guess the next step would be to investigate how effective LLM agents are to interact with codebases. Hopefully it provides better alternative to generating and using vector embedding for vendored dependencies.