feat: init Better Auth and DB

package.json

@@ -10,17 +10,28 @@
     "format": "prettier . --write"
   },
   "dependencies": {
+    "@fontsource-variable/inter": "^5.2.8",
     "@react-router/fs-routes": "^7.15.1",
     "@react-router/node": "7.15.1",
     "@react-router/serve": "7.15.1",
+    "better-auth": "^1.6.11",
+    "better-sqlite3": "^12.10.0",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
     "isbot": "^5.1.36",
+    "lucide-react": "^1.16.0",
+    "radix-ui": "^1.4.3",
     "react": "^19.2.6",
     "react-dom": "^19.2.6",
-    "react-router": "7.15.1"
+    "react-router": "7.15.1",
+    "shadcn": "^4.7.0",
+    "tailwind-merge": "^3.6.0",
+    "tw-animate-css": "^1.4.0"
   },
   "devDependencies": {
     "@react-router/dev": "7.15.1",
     "@tailwindcss/vite": "^4.2.2",
+    "@types/better-sqlite3": "^7.6.13",
     "@types/node": "^22",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",