Announcements Portal Module

Implement an **Announcements** system for events. Participants should be able to view announcements from organizers, and organizers should be able to create and manage announcements from their dashboard.

#### Event Page (Participant View)
- Add an **Announcements** tab.
- Display a list of announcements in reverse chronological order (latest first).
- Each announcement should show:
- Title
- Content
- Author (Organizer name)
- Time of publishing

#### Organizer Dashboard
- Add an **Announcements** section/tab.
- Allow organizers to:
- Create a new announcement (Title + Content)
- View previously published announcements