refactor: move studio to frontends workspace

- Move studio from root to frontends/studio/
- Add owner-tools frontend for live blog admin UI
- Add shared ui component library
- Set up npm workspaces for frontends
- Add enhanced code block extension for editor

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontends/studio/package.json

@@ -0,0 +1,50 @@
+{
+  "name": "writekit-studio",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc --noEmit && vite build",
+    "preview": "vite preview",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@writekit/ui": "*",
+    "@iconify-json/logos": "^1.2.10",
+    "@iconify-json/lucide": "^1.2.82",
+    "@monaco-editor/react": "^4.7.0",
+    "@nanostores/query": "^0.3.4",
+    "@nanostores/react": "^1.0.0",
+    "@nanostores/router": "^1.0.0",
+    "@tiptap/extension-code-block-lowlight": "^3.15.1",
+    "@tiptap/extension-image": "^3.15.1",
+    "@tiptap/extension-link": "^3.15.1",
+    "@tiptap/extension-placeholder": "^3.15.1",
+    "@tiptap/extension-table": "^3.15.1",
+    "@tiptap/extension-task-item": "^3.15.1",
+    "@tiptap/extension-task-list": "^3.15.1",
+    "@tiptap/markdown": "^3.15.1",
+    "@tiptap/pm": "^3.15.1",
+    "@tiptap/react": "^3.15.1",
+    "@tiptap/starter-kit": "^3.15.1",
+    "@tiptap/suggestion": "^3.15.2",
+    "@unocss/reset": "^66.5.12",
+    "chart.js": "^4.5.1",
+    "lowlight": "^3.3.0",
+    "monaco-editor": "^0.55.1",
+    "nanostores": "^1.1.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "tippy.js": "^6.3.7",
+    "unocss": "^66.5.12"
+  },
+  "devDependencies": {
+    "@iconify-json/simple-icons": "^1.2.65",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
+    "@vitejs/plugin-react": "^5.1.0",
+    "typescript": "^5.7.0",
+    "vite": "^7.3.0"
+  }
+}