refactor: restore root-level development workflow with enhanced tooling

- Add root package.json with development scripts and dependencies
- Move scripts/ from lib back to root for intuitive developer experience
- Clean lib/package.json to contain only runtime dependencies
- Add comprehensive justfile with cross-platform command shortcuts
- Update README.md with new development workflow instructions
- Maintain lib as clean, publishable package while enabling root-level commands

package.json

@@ -0,0 +1,49 @@
+{
+  "name": "insertr",
+  "version": "0.1.0",
+  "description": "The Tailwind of CMS - Zero-configuration content editing for any static site",
+  "main": "lib/dist/insertr.js",
+  "type": "module",
+  "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": "node scripts/build.js",
+    "build:lib": "cd lib && npm run build",
+    "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",
+    "install:all": "npm install && cd lib && npm install"
+  },
+  "keywords": [
+    "cms",
+    "headless-cms",
+    "static-site-generator",
+    "content-management",
+    "build-time-enhancement",
+    "zero-config",
+    "go",
+    "javascript"
+  ],
+  "author": "Insertr Team",
+  "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"
+  ],
+  "dependencies": {}
+}