Markdown parser fork with extended syntax for personal use.

Add support for proper positional info in swc tree master

* Fix some positional info in SWC error messages * Add positional info in `to_document` on duplicate layouts * Add support for `path` on `Program` (`to_swc`, `to_document`, `jsx_rewrite`), for the path of a file on disk * Add support for `development` to `jsx-rewrite`, which when defined will embed info on where tags were written into the runtime code when they are not passed * Refactor to move some utilities to `micromark_swc_utils.rs`, `swc_utils.rs`