Add fully local conversational AI pipeline for Reachy Mini

Local STT (Qwen3-ASR), VLM (Gemma 4 26B-A4B), and TTS (Spark-TTS) running
on Apple Silicon via MLX, with bracket-tag action system for nod, shake,
wiggle, dance, photo, and pre-recorded emotions.

look_at_click.py

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+"""Demonstrate how to make Reachy Mini look at a point in an image.
+
+When you click on the image, Reachy Mini will look at the point you clicked on.
+It uses OpenCV to capture video from a camera and display it, and Reachy Mini's
+look_at_image method to make the robot look at the specified point.
+
+Note: The daemon must be running before executing this script.
+"""
+
+import argparse
+
+import cv2
+
+from reachy_mini import ReachyMini
+
+
+def click(event, x, y, flags, param):
+    """Handle mouse click events to get the coordinates of the click."""
+    if event == cv2.EVENT_LBUTTONDOWN:
+        param["just_clicked"] = True
+        param["x"] = x
+        param["y"] = y
+
+
+def main(backend: str) -> None:
+    """Show the camera feed from Reachy Mini and make it look at clicked points."""
+    state = {"x": 0, "y": 0, "just_clicked": False}
+
+    cv2.namedWindow("Reachy Mini Camera")
+    cv2.setMouseCallback("Reachy Mini Camera", click, param=state)
+
+    print("Click on the image to make ReachyMini look at that point.")
+    print("Press 'q' to quit the camera feed.")
+    with ReachyMini(localhost_only=False, media_backend=backend) as reachy_mini:
+        try:
+            while True:
+                frame = reachy_mini.media.get_frame()
+
+                if frame is None:
+                    print("Failed to grab frame.")
+                    continue
+
+                cv2.imshow("Reachy Mini Camera", frame)
+                if cv2.waitKey(1) & 0xFF == ord("q"):
+                    print("Exiting...")
+                    break
+
+                if state["just_clicked"]:
+                    reachy_mini.look_at_image(state["x"], state["y"], duration=0.3)
+                    state["just_clicked"] = False
+        except KeyboardInterrupt:
+            print("Interrupted. Closing viewer...")
+        finally:
+            cv2.destroyAllWindows()
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Display Reachy Mini's camera feed and make it look at clicked points."
+    )
+    parser.add_argument(
+        "--backend",
+        type=str,
+        choices=["default", "gstreamer", "webrtc"],
+        default="default",
+        help="Media backend to use.",
+    )
+
+    args = parser.parse_args()
+    main(backend=args.backend)