Empty OCaml Project

Inspired by Mukul Rathi's OCaml Testing template & Martin Jambon's Dune starter template

Main changes:

.ocamlinit contains specific settings for Utop:
- Auto-complete suggestions are disabled to make Utop less visually noisy
- To load definitions in files contained in the [lib] directory (e.g. lib/starter.ml), add the following lines to the end of .ocamlinit:
```
#mod_use "starter.ml";;

open Starter
```
Various compiler warnings regarding unused variables are suppressed via the dune files in both lib & bin
.ocamlformat contains linter settings that have worked well for me personally in past OCaml projects

Troubleshooting

Update the version field in the .ocamlformat file to match the version of ocamlformat that is installed locally. For example, if your local version of ocamlformat is 0.26.2, then update the .ocamlformat file with:

version = 0.26.2
...

Other quality of life improvements:

Run odig doc in the terminal to show the API docs of locally installed packages.
- If odig hasn't been installed yet, run opam install odig
Use Sherlodoc to search for functions in OCaml libraries via their type signature (à la Hoogle)

Provide feedback