examples: add demo to show all mavsdk_server output

This should now work properly thanks to this fix:
mavlink/MAVSDK#2631

Author: julianoes

examples/show_debug_output.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+"""
+Test to see all output including debug messages
+"""
+
+import asyncio
+import logging
+from mavsdk import System
+
+# Setup logging to see EVERYTHING
+logging.basicConfig(
+    level=logging.DEBUG, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+)
+
+
+async def test_see_all():
+    print("Testing with DEBUG level to see all messages...")
+
+    drone = System()
+    try:
+        await asyncio.wait_for(drone.connect("invalid://bad:connection"), timeout=8)
+    except asyncio.TimeoutError:
+        print("Timed out - all messages should be visible above")
+    except Exception as e:
+        print(f"Got exception: {e}")
+
+
+if __name__ == "__main__":
+    asyncio.run(test_see_all())