guweigang packages

`vmarkdown` is a V wrapper around [md4c](https://github.com/mity/md4c) that builds a typed Markdown AST instead of only streaming HTML.

V bindings to quickjs javascript engine. Run JS/TS in V. Extend js functions with V

a Vlang library for building PHP extensions natively in Vlang, with bindings and abstractions over the PHP/Zend extension API