Replace std::cout and std::cerr with fmt::print() (#3519)

simulation/halsim_ws_client/src/dev/native/cpp/main.cpp

@@ -2,9 +2,9 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#include <iostream>
 #include <thread>
 
+#include <fmt/core.h>
 #include <hal/DriverStation.h>
 #include <hal/HALBase.h>
 #include <hal/Main.h>
@@ -21,9 +21,9 @@ int main() {
   while (cycleCount < 100) {
     std::this_thread::sleep_for(std::chrono::milliseconds(100));
     cycleCount++;
-    std::cout << "Count: " << cycleCount << std::endl;
+    fmt::print("Count: {}\n", cycleCount);
   }
 
-  std::cout << "DONE" << std::endl;
+  fmt::print("DONE\n");
   HAL_ExitMain();
 }