Refactor NostrFeed module and remove marketplace components

- Deleted the MarketProduct component and associated market parsing logic, streamlining the NostrFeed module.
- Updated FeedService to exclude marketplace events from the main feed, ensuring clearer event management.
- Adjusted content filters to remove marketplace-related entries, enhancing the organization of content filtering.

These changes improve the clarity and efficiency of the NostrFeed module by separating marketplace functionality.

src/modules/nostr-feed/services/FeedService.ts

@@ -279,10 +279,6 @@ export class FeedService extends BaseService {
       return false
     }
 
-    // Exclude marketplace events (they have their own dedicated section)
-    if (event.kind === 30017 || event.kind === 30018 || event.kind === 30019) {
-      return false
-    }
 
     const isAdminPost = config.adminPubkeys?.includes(event.pubkey) || false