Use filetypes instead of langs from treesitter

[leiserfg]

No description provided.

[L3MON4D3]

Oh cool, I'd worried about having to hardcode something like this!
I'm a bit unsure about 1. get_filetypes returns a list, so return { ..get_filetypes(..)} seems wrong, and 2. I don't know about availability (wrt nvim-version) of get_filetypes, could you make sure it's only called when available (vim.F.if_nil should work splendidly)

[leiserfg]

Sure, we could fallback to 'lang' if missing, regarding returning the file types, I'm not sure if we should if should join them with '.' or keep only the first

Edit: Kids, don't comment in GitHub while drunk.

[L3MON4D3]

Yeaah that's the stuff 👌 :D