Transfer code (#1)

* copy project root files

* import previously created code and rename where needed

* fix license and lint

* main is now just a JS wrapper

* minified main.cjs rather than copying to a newly named file

bin/dune

@@ -1,4 +1,8 @@
 (executable
- (public_name pgn_to_tex)
  (name main)
- (libraries pgn_to_tex))
+ (modes js)
+ (libraries pgn_to_tex js_of_ocaml yojson)
+ (preprocess
+  (pps js_of_ocaml-ppx))
+ (enabled_if
+  (= %{env:CI=false} "false")))