Htmx skill that includes everything

Not just a shallow skill that points to the source docs. This is the entire corpus of HTMX + official plugins. So it has references for how-to Websocket, SSE, preload, etc. as well as the core library.

If you try it out and you find issues with how it references things, feel free to drop an issue on the repo and I'll fix it ASAP.

Enjoy!