feat: add Reachability Center and Why Drawer components with tests

- Implemented ReachabilityCenterComponent for displaying asset reachability status with summary and filtering options.
- Added ReachabilityWhyDrawerComponent to show detailed reachability evidence and call paths.
- Created unit tests for both components to ensure functionality and correctness.
- Updated accessibility test results for the new components.

docs/api/gateway/samples/orchestrator-packrun-retry.json

@@ -0,0 +1,7 @@
+{
+  "originalPackRunId": "99999999-9999-9999-9999-999999999999",
+  "newPackRunId": "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
+  "status": "scheduled",
+  "createdAt": "2025-12-12T00:00:00Z",
+  "traceId": "trace-sample"
+}