Fix that command could be triggered when Xcode is not active

Author: intitni

Core/Sources/Service/RealtimeSuggestionController.swift

@@ -113,6 +113,7 @@ public actor RealtimeSuggestionController {
 
         Task { @WorkspaceActor in // Get cache ready for real-time suggestions.
             guard UserDefaults.shared.value(for: \.preCacheOnFileOpen) else { return }
+            guard await XcodeInspector.shared.activeApplication?.isXcode ?? false else { return }
             guard let fileURL = XcodeInspector.shared.realtimeActiveDocumentURL
             else { return }
             let (_, filespace) = try await Service.shared.workspacePool