feat: implement build system and development workflow

- Add npm scripts for CSS/JS compilation (build:css, build:js, build)
- Create PowerShell build automation script
- Document development workflow in README
- Add troubleshooting guide for build issues
- Specify proper file structure and compilation process

Supports Tailwind CSS v3.4.0 and esbuild bundling with source maps.

node_modules/postcss/lib/symbols.js

@@ -0,0 +1,5 @@
+'use strict'
+
+module.exports.isClean = Symbol('isClean')
+
+module.exports.my = Symbol('my')