Convert hover ocaml code to reason

Can we parse ocaml code inside comment hover docs and convert them to reason?
maybe with `reftmt --parse ml`

Start by locating the hover documentation handling in the language server and check whether `reftmt --parse ml` provides the needed conversion. Done means OCaml code inside comment hover documentation is parsed and presented as Reason code; add or update coverage for this behavior if the project has relevant tests.

Written by the indexing model from the issue text.