Proposal: add build.erl to speed up process of bootstrapping

Hello,
Thanks for creating this amazing Lisp.

I noticed that process of bootstrapping Joxa is slow since an Erlang VM is started per module, so I wrote an escript to speed up bootstrapping, compiling and making AST files, that can do each of these tasks in one VM running, which means, an Erlang VM running per task.

Any thoughts on this?