Modernize codebase

package.json

@@ -4,10 +4,16 @@
   "description": "Generate AI-powered audio descriptions for video content",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
+  "bin": {
+    "aidio-desc": "./dist/cli/index.js"
+  },
+  "files": [
+    "dist"
+  ],
   "scripts": {
     "build": "tsc",
-    "start": "node dist/index.js",
-    "dev": "ts-node src/index.ts",
+    "start": "node dist/cli/index.js",
+    "dev": "ts-node src/cli/index.ts",
     "test": "jest",
     "lint": "eslint src/**/*.ts",
     "prepublishOnly": "npm run build"