Update MessengerDestroy

• Stop network follower if running
• Wait until CMix has no running processes

Sources/XXMessengerClient/Messenger/Functions/MessengerDestroy.swift

@@ -11,6 +11,16 @@ public struct MessengerDestroy {
 extension MessengerDestroy {
   public static func live(_ env: MessengerEnvironment) -> MessengerDestroy {
     MessengerDestroy {
+      if let cMix = env.cMix() {
+        if cMix.networkFollowerStatus() == .running {
+          try cMix.stopNetworkFollower()
+        }
+        var hasRunningProcesses = cMix.hasRunningProcesses()
+        while hasRunningProcesses {
+          env.sleep(1)
+          hasRunningProcesses = cMix.hasRunningProcesses()
+        }
+      }
       env.ud.set(nil)
       env.e2e.set(nil)
       env.cMix.set(nil)