refactor: remove GitHub authentication API endpoints and add new components

- Deleted GitHub callback and authentication handler files.
- Added new component for displaying headlines.
- Implemented hot news feed component with external API fetching.
- Created dynamic news provider page with routing.
- Developed news organization about page with animations and data fetching.
- Introduced a code of conduct document.

package.json

@@ -13,6 +13,7 @@
     "start": "bun run .output/server/index.mjs"
   },
   "dependencies": {
+    "@clerk/nuxt": "^1.6.3",
     "@fontsource-variable/noto-sans-tc": "^5.2.5",
     "@fontsource/fira-code": "^5.2.6",
     "@fontsource/fira-sans": "^5.2.5",