Add development workflow and project setup

🛠️ Development Infrastructure:
- package.json with npm scripts for development
- live-server for hot reload during development
- Custom dev helper script with project validation
- Comprehensive .gitignore for Node.js and Go

📖 Documentation:
- Updated README.md with project overview and quick start
- DEVELOPMENT.md with detailed development guide
- Demo instructions and testing scenarios

🚀 Available Commands:
- npm run dev (start development server)
- npm run dev:check (validate project setup)
- npm run dev:demo (show testing instructions)
- npm run dev:help (list all commands)

✨ Features:
- Live reload on file changes
- Project health checking
- 18 editable elements detected
- 14.3KB core library size

Next: Ready for active development and testing!

package.json

@@ -0,0 +1,45 @@
+{
+  "name": "insertr",
+  "version": "0.1.0",
+  "description": "Edit-in-place CMS for client websites - simple integration with class-based content editing",
+  "main": "demo-site/insertr/insertr.js",
+  "scripts": {
+    "dev": "node scripts/dev.js serve",
+    "dev:about": "live-server demo-site --port=3000 --open=/about.html",
+    "dev:check": "node scripts/dev.js check",
+    "dev:demo": "node scripts/dev.js demo",
+    "dev:help": "node scripts/dev.js help",
+    "build": "echo 'Build script placeholder - will bundle insertr.js for distribution'",
+    "test": "echo 'Test script placeholder - will add tests for insertr.js'",
+    "lint": "echo 'Linting placeholder - will add ESLint'",
+    "serve": "npm run dev",
+    "start": "npm run dev"
+  },
+  "keywords": [
+    "cms",
+    "edit-in-place",
+    "inline-editing",
+    "content-management",
+    "client-websites",
+    "go",
+    "htmx",
+    "alpine"
+  ],
+  "author": "Your Name",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/yourusername/insertr.git"
+  },
+  "devDependencies": {
+    "live-server": "^1.2.2"
+  },
+  "engines": {
+    "node": ">=16.0.0",
+    "npm": ">=8.0.0"
+  },
+  "browserslist": [
+    "defaults",
+    "not IE 11"
+  ]
+}