chore: replace sonner with base-ui toast primitive

package.json

@@ -35,7 +35,6 @@
     "@tabler/icons-react": "^3.46.0",
     "@vercel/analytics": "^2.0.1",
     "@vercel/functions": "^3.9.3",
-    "@vercel/speed-insights": "^2.0.0",
     "better-auth": "1.7.0-rc.6",
     "cheerio": "^1.2.0",
     "class-variance-authority": "^0.7.1",
@@ -74,7 +73,6 @@
     "server-only": "0.0.1",
     "shadcn": "^4.18.0",
     "shiki": "^4.4.3",
-    "sonner": "^2.0.8",
     "tailwind-merge": "^3.6.0",
     "tinyglobby": "^0.2.17",
     "unified": "^11.0.5",