feat(web): payload cms v3 + blog + changelog data model

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/package.json

@@ -20,6 +20,9 @@
     "@hookform/resolvers": "5.2.2",
     "@next/bundle-analyzer": "16.0.10",
     "@number-flow/react": "0.5.10",
+    "@payloadcms/db-sqlite": "^3.81.0",
+    "@payloadcms/next": "^3.81.0",
+    "@payloadcms/richtext-lexical": "^3.81.0",
     "@tanstack/react-query": "catalog:",
     "@tanstack/react-query-devtools": "catalog:",
     "@tanstack/react-table": "catalog:",
@@ -44,6 +47,7 @@
     "next-i18n-router": "5.5.5",
     "next-themes": "0.4.6",
     "nuqs": "2.7.2",
+    "payload": "^3.81.0",
     "pdfjs-dist": "5.4.530",
     "qrcode": "1.5.4",
     "react": "catalog:react19",
@@ -57,6 +61,7 @@
     "rehype-raw": "7.0.0",
     "remark-gfm": "4.0.1",
     "remark-math": "6.0.0",
+    "sharp": "0.34.5",
     "sonner": "2.0.7",
     "zod": "catalog:",
     "zustand": "5.0.8"