add dora-joy node publishing gamepad axes and buttons

dora_joy/log.py

@@ -0,0 +1,13 @@
+"""Timestamped stderr logging.
+
+stderr rather than stdout: dora reads a dynamic node's stdout, and a print that
+lands there is noise in the wrong stream.
+"""
+
+import sys
+import time
+
+
+def log(message: str) -> None:
+    """Print a timestamped line for the node."""
+    print(f"[joy {time.strftime('%H:%M:%S')}] {message}", file=sys.stderr, flush=True)