fix(deps): update dependency zod to v4

Author: renovate[bot]

bun.lock

@@ -64,7 +64,7 @@
     "sharp": "^0.34.0",
     "tailwind-merge": "^3.0.0",
     "tailwindcss-animate": "^1.0.7",
-    "zod": "^3.25.7"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.1",