Alpine.js

This is a fork of https://github.com/alpinejs/alpine/tree/v2.8.2

It adds readonly attribute to x-model, for cases where we want a particular data to always represent the current value <input>/<select>/etc

npm install && \
npm run build && \
cp packages/alpinejs/dist/cdn.js ~/super-pas/assets/js/vendor/alpine-readonly-fork.js