Initial commit: Unity Needle AR Menu project with MenuScene and SampleScene web apps

Add root .gitignore for Unity Library/Temp/Logs, IDE folders, and node_modules.
Include Assets, Needle TypeScript (MenuController, asset picker, WebXR), and project configuration.

Made-with: Cursor

Needle/SampleScene/tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "module": "ESNext",
+    "lib": ["ESNext", "DOM"],
+    "moduleResolution": "Node",
+    "strict": true,
+    "sourceMap": true,
+    "resolveJsonModule": true,
+    "esModuleInterop": true,
+    "noEmit": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true,
+    "noImplicitAny": false,
+    "experimentalDecorators": true,
+    "skipLibCheck": true
+  },
+  "include": ["./src"]
+}