Fix Claude Atlassian plugin installation

Author: bedrich-schindler

.claude/settings.json

@@ -28,5 +28,13 @@
   "enabledPlugins": {
     "github@claude-plugins-official": true,
     "context7@claude-plugins-official": true
+  },
+  "extraKnownMarketplaces": {
+    "claude-plugins-official": {
+      "source": {
+        "source": "github",
+        "repo": "anthropics/claude-plugins-official"
+      }
+    }
   }
 }