Add EventDetails component and types with proper type definitions

frontend/src/types.ts

@@ -0,0 +1,20 @@
+export interface Event {
+  id: number;
+  title: string;
+  description: string;
+  date: string;
+  location: string;
+  slug: string;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface Rsvp {
+  id: number;
+  event_id: number;
+  name: string;
+  email: string;
+  status: 'attending' | 'not_attending' | 'maybe';
+  created_at: string;
+  updated_at: string;
+}