feat: add CliStreamMonitor and related components for CLI output streaming

- Implemented CliStreamMonitor component for real-time CLI output monitoring with multi-execution support.
- Created JsonFormatter component for displaying JSON content in various formats (text, card, inline).
- Added utility functions for JSON detection and formatting in jsonUtils.ts.
- Introduced LogBlock utility functions for styling CLI output lines.
- Developed a new Collapsible component for better UI interactions.
- Created IssueHubPage for managing issues, queue, and discovery with tab navigation.

ccw/frontend/src/components/ui/index.ts

@@ -85,3 +85,10 @@ export {
   ToastClose,
   ToastAction,
 } from "./Toast";
+
+// Collapsible (Radix)
+export {
+  Collapsible,
+  CollapsibleTrigger,
+  CollapsibleContent,
+} from "./Collapsible";