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.

components/app/news/[provider]/[slug].vue

@@ -0,0 +1,7 @@
+<script lang="ts" setup>
+const route = useRoute();
+
+const provider = route.params.provider;
+const slug = route.params.slug;
+</script>
+<template></template>