[connectors] Support connectors part 2 - slash command and tui (#9728)

- [x] Support `/apps` slash command to browse the apps in tui.
- [x] Support inserting apps to prompt using `$`.
- [x] Lots of simplification/renaming from connectors to apps.

codex-rs/app-server/src/codex_message_processor.rs

@@ -13,7 +13,6 @@ use codex_app_server_protocol::AccountLoginCompletedNotification;
 use codex_app_server_protocol::AccountUpdatedNotification;
 use codex_app_server_protocol::AddConversationListenerParams;
 use codex_app_server_protocol::AddConversationSubscriptionResponse;
-use codex_app_server_protocol::AppInfo as ApiAppInfo;
 use codex_app_server_protocol::AppsListParams;
 use codex_app_server_protocol::AppsListResponse;
 use codex_app_server_protocol::ArchiveConversationParams;
@@ -3712,7 +3711,7 @@ impl CodexMessageProcessor {
             }
         };
 
-        if !config.features.enabled(Feature::Connectors) {
+        if !config.features.enabled(Feature::Apps) {
             self.outgoing
                 .send_response(
                     request_id,
@@ -3775,18 +3774,7 @@ impl CodexMessageProcessor {
         }
 
         let end = start.saturating_add(effective_limit).min(total);
-        let data = connectors[start..end]
-            .iter()
-            .cloned()
-            .map(|connector| ApiAppInfo {
-                id: connector.connector_id,
-                name: connector.connector_name,
-                description: connector.connector_description,
-                logo_url: connector.logo_url,
-                install_url: connector.install_url,
-                is_accessible: connector.is_accessible,
-            })
-            .collect();
+        let data = connectors[start..end].to_vec();
 
         let next_cursor = if end < total {
             Some(end.to_string())