raylib screenshots: add mouse click helper (#36253)

* add helper

* rm

* name

* fix

selfdrive/ui/tests/test_ui/print_mouse_coords.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+"""
+Simple script to print mouse coordinates on Ubuntu.
+Run with: python print_mouse_coords.py
+Press Ctrl+C to exit.
+"""
+
+from pynput import mouse
+
+print("Mouse coordinate printer - Press Ctrl+C to exit")
+print("Click to set the top left origin")
+
+origin: tuple[int, int] | None = None
+clicks: list[tuple[int, int]] = []
+
+
+def on_click(x, y, button, pressed):
+  global origin, clicks
+  if pressed:  # Only on mouse down, not up
+    if origin is None:
+      origin = (x, y)
+      print(f"Origin set to: {x},{y}")
+    else:
+      rel_x = x - origin[0]
+      rel_y = y - origin[1]
+      clicks.append((rel_x, rel_y))
+      print(f"Clicks: {clicks}")
+
+
+if __name__ == "__main__":
+  try:
+    # Start mouse listener
+    with mouse.Listener(on_click=on_click) as listener:
+      listener.join()
+  except KeyboardInterrupt:
+    print("\nExiting...")