Add frontend config and API client

frontend/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "excalidraw-go-frontend",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "prebuild": "node scripts/copy-fonts.mjs",
+    "predev": "node scripts/copy-fonts.mjs",
+    "dev": "vite",
+    "build": "tsc --noEmit && vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@excalidraw/excalidraw": "0.18.1",
+    "react": "^19.1.0",
+    "react-dom": "^19.1.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19.1.0",
+    "@types/react-dom": "^19.1.0",
+    "@vitejs/plugin-react": "^5.0.0",
+    "typescript": "^5.8.0",
+    "vite": "^7.0.0"
+  }
+}