feat(01-01): install Drizzle ORM, postgres-js, and configure DB client

- drizzle-orm@0.45.2 + postgres@3.4.9 installed (postgres-js driver)
- drizzle-kit@0.31.10 installed as dev dependency
- nanoid@5, zod@4, react-hook-form, @hookform/resolvers installed
- src/db/index.ts: Drizzle client initialized with postgres-js driver
- drizzle.config.ts: configured for postgresql dialect + src/db/schema.ts
- .env.example: added as public template (no secrets)
- .gitignore: allow .env.example while blocking all other .env* files

package.json

@@ -9,15 +9,22 @@
     "lint": "eslint"
   },
   "dependencies": {
+    "@hookform/resolvers": "^5.2.2",
+    "drizzle-orm": "^0.45.2",
+    "nanoid": "^5.1.11",
     "next": "16.2.6",
+    "postgres": "^3.4.9",
     "react": "19.2.4",
-    "react-dom": "19.2.4"
+    "react-dom": "19.2.4",
+    "react-hook-form": "^7.75.0",
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
+    "drizzle-kit": "^0.31.10",
     "eslint": "^9",
     "eslint-config-next": "16.2.6",
     "tailwindcss": "^4",