Melange and TEA docs

This place is intended to host tutorials and documentation for Melange and TEA.

For now it is only hosting the old Bucklescript documentation, and the API documentation of Tablecloth, for convenience. The rest is very much WIP.

Ideally, every code sample should show all 3 syntaxes (OCaml, ReasonML, Rescript).

For contributing, please use the GitLab repository.