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-load-config/src/req.js

@@ -0,0 +1,10 @@
+// eslint-disable-next-line n/no-deprecated-api
+const { createRequire, createRequireFromPath } = require('module')
+
+function req (name, rootFile) {
+  const create = createRequire || createRequireFromPath
+  const require = create(rootFile)
+  return require(name)
+}
+
+module.exports = req