Show error if Input Monitoring not enabled when toggling real-time suggestions state

Author: intitni

Core/Sources/Service/XPCService.swift

@@ -246,6 +246,15 @@ public class XPCService: NSObject, XPCServiceProtocol {
     }
 
     public func setAutoSuggestion(enabled: Bool, withReply reply: @escaping (Error?) -> Void) {
+        struct NoInputMonitoringPermission: Error, LocalizedError {
+            var errorDescription: String? {
+                "Permission for Input Monitoring is not granted to make real-time suggestions work. Please turn in on in System Settings.app and try again later."
+            }
+        }
+        guard AXIsProcessTrusted() else {
+            reply(NoInputMonitoringPermission())
+            return
+        }
         Task { @ServiceActor in
             let fileURL = try await Environment.fetchCurrentFileURL()
             let workspace = try await fetchOrCreateWorkspaceIfNeeded(fileURL: fileURL)