feat: Implement blog and blog post models, routes, and services

- Added Blog and BlogPost models with necessary fields and relationships.
- Created blogRouter for handling blog-related API endpoints including CRUD operations.
- Developed BlogService for business logic related to blogs and posts, including sharing functionality.
- Implemented API client methods for frontend to interact with blog-related endpoints.
- Added internationalization support for blog-related text in English and German.
- Created Vue components for blog editing, listing, and viewing, including a rich text editor for post content.
- Enhanced user experience with form validations and dynamic visibility settings based on user input.

frontend/package.json

@@ -8,10 +8,16 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tiptap/extension-color": "^2.14.0",
+    "@tiptap/extension-image": "^2.14.0",
+    "@tiptap/extension-text-align": "^2.14.0",
+    "@tiptap/extension-text-style": "^2.14.0",
+    "@tiptap/extension-underline": "^2.14.0",
     "@tiptap/starter-kit": "^2.14.0",
     "@tiptap/vue-3": "^2.14.0",
     "axios": "^1.7.2",
     "date-fns": "^3.6.0",
+    "dompurify": "^3.2.6",
     "dotenv": "^16.4.5",
     "mitt": "^3.0.1",
     "socket.io-client": "^4.8.1",