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/eastasianwidth/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "eastasianwidth",
+  "version": "0.2.0",
+  "description": "Get East Asian Width from a character.",
+  "main": "eastasianwidth.js",
+  "files": [
+    "eastasianwidth.js"
+  ],
+  "scripts": {
+    "test": "mocha"
+  },
+  "repository": "git://github.com/komagata/eastasianwidth.git",
+  "author": "Masaki Komagata",
+  "license": "MIT",
+  "devDependencies": {
+    "mocha": "~1.9.0"
+  }
+}