This is a new annoucement

Added announcement feed component showing high-priority announcements:

• Shows top 3 high/critical priority announcements
• Compact view for discovery page

Full admin dashboard for managing announcements:

Features:

• List all announcements with filters
• Status filter (all, draft, scheduled, published, archived)
• Priority filter (all, low, normal, high, critical)
• Quick actions:
  • Edit - Edit announcement
  • Publish Now - Immediately publish draft
  • Archive - Archive published announcement
  • View - Open in new tab
  • Delete - Hard delete announcement
• Status badges (draft, scheduled, published, archived)
• Priority badges (low, normal, high, critical)
• Stats display (views, likes, comments)
• Pinned indicator
• Date formatting