feat: add per-request hooks

[williamboman]

I also took the opportunity to add some EmmyLua type annotations, let me know if you want to remove these!

Closes #47.

[DNLHC]

Hey, cool feature I like the idea!
I'm actually in the process of covering the project with type annotations, so your PR is very much welcome, thanks a lot!
So far I've partially covered list and winbar modules, so there won't be any conflicts.

offtopic: Do you know if there is a way to infer a type from a built-in neovim function, for example get the return type of vim.lsp.util.make_position_params function, or do i need to provide the types myself?

[williamboman]

offtopic: Do you know if there is a way to infer a type from a built-in neovim function, for example get the return type of vim.lsp.util.make_position_params function, or do i need to provide the types myself?

Hm no I don't think that's possible currently. There's the @module annotation, so the closest I could get to was @module 'vim.lsp.util'.

[DNLHC]

Looks good, thank you