Scaffold Astro/Strapi monorepo for the site rebuild

Set up a pnpm workspace with apps/site (Astro) and apps/cms (Strapi,
SQLite-backed) as the foundation for the new digital-legacy site.
Switches package management to pnpm and adds Biome for linting/
formatting, replacing npm/no-linter setup. Existing Zola site stays
in place for now and will be migrated/removed progressively.

apps/cms/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "cms",
+  "version": "0.1.0",
+  "private": true,
+  "description": "A Strapi application",
+  "scripts": {
+    "build": "strapi build",
+    "console": "strapi console",
+    "deploy": "strapi deploy",
+    "dev": "strapi develop",
+    "develop": "strapi develop",
+    "start": "strapi start",
+    "strapi": "strapi",
+    "upgrade": "npx @strapi/upgrade latest",
+    "upgrade:dry": "npx @strapi/upgrade latest --dry"
+  },
+  "dependencies": {
+    "@strapi/database": "5.52.2",
+    "@strapi/plugin-cloud": "5.52.2",
+    "@strapi/plugin-users-permissions": "5.52.2",
+    "@strapi/strapi": "5.52.2",
+    "better-sqlite3": "12.8.0",
+    "react": "^18.0.0",
+    "react-dom": "^18.0.0",
+    "react-router-dom": "^6.30.3",
+    "styled-components": "^6.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "typescript": "^5"
+  },
+  "engines": {
+    "node": ">=20.0.0 <=26.x.x",
+    "npm": ">=6.0.0"
+  },
+  "strapi": {
+    "uuid": "53c467c6-a64c-4883-b4df-0d96747d2cf3",
+    "installId": "dcf09d0c097e16db63c329dd9602949f9c4ae64f4e69a04dc6e105313d30b369"
+  }
+}