OCaml major mode using tree-sitter

Note WIP; currently only provides syntax highlighting

Installing

Requires Emacs 29 built with treesitter support and the tree-sitter-ocaml grammars.

Install the package from this repo using M-x package-vc-install. Then, run M-x ocaml-ts-mode-install-grammar to fetch and compile the tree-sitter grammars.