fix: add "single-file-component" languages

Related issue: #781 (closed)

This might be the dumbest way to fix, however I've done some research and it seems that this is the best way to approach it at least for now. Other extensions (like copilot) also do nothing about providing "extra context" ("hey, we're in script block of vue template, generate js suggestion", "hey we're in template block, that should be html") about current block and it is solely handled on backend

I'm open for any suggestions how we could better handle that