Support the PyBoard v1.1 as much as the Feather was, at least

entrypoints/pyboard.py

@@ -0,0 +1,10 @@
+import sys
+
+from kmk_keyboard_user import main
+
+if __name__ == '__main__':
+    try:
+        main()
+    except Exception as e:
+        sys.print_exception(e)
+        sys.exit(1)

entrypoints/pyboard_boot.py

@@ -0,0 +1,3 @@
+import pyb
+
+pyb.usb_mode('VCP+HID')  # act as a serial device and a mouse