refactor: completely remove payload cms and convert to static/mdx approaches

package.json

@@ -11,8 +11,6 @@
     "lint": "eslint app components lib scripts",
     "test": "vitest",
     "prepare": "husky",
-    "generate:types": "payload generate:types",
-    "generate:importmap": "payload generate:importmap",
     "pagespeed:test": "mintel pagespeed test",
     "check:http": "tsx ./scripts/check-http.ts",
     "check:apis": "tsx ./scripts/check-apis.ts",
@@ -31,20 +29,12 @@
     "@mintel/mail": "^1.8.21",
     "@mintel/next-config": "^1.8.21",
     "@mintel/next-utils": "^1.8.21",
-    "@payloadcms/db-postgres": "^3.77.0",
-    "@payloadcms/email-nodemailer": "^3.77.0",
-    "@payloadcms/next": "^3.77.0",
-    "@payloadcms/richtext-lexical": "^3.77.0",
-    "@payloadcms/storage-s3": "^3.77.0",
-    "@payloadcms/ui": "^3.77.0",
     "@sentry/nextjs": "^10.38.0",
     "framer-motion": "^12.29.2",
-    "graphql": "^16.13.0",
     "lucide-react": "^0.562.0",
     "next": "^16.1.6",
     "next-intl": "^4.8.2",
     "nodemailer": "^7.0.12",
-    "payload": "^3.77.0",
     "pino": "^10.3.0",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",