Added pose_estimation.py with real-time 3D pose estimation code

pose_estimation.py

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+
+### 3. **Add Comments in Code**
+
+Adding comments in your code can help explain complex sections and improve readability.
+
+**Example:**
+```python
+while cap.isOpened():
+    ret, frame = cap.read()
+    if not ret:
+        break
+
+    # Convert the frame to RGB (required by Mediapipe)
+    frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+
+    # Process the frame to obtain pose landmarks
+    results = pose_detector.process(frame_rgb)
+
+    # Draw landmarks on the frame (optional for visualization)
+    draw_landmarks_on_image(frame, results)
+
+    # Extract 3D landmarks
+    landmark_positions_3d = read_landmark_positions_3d(results)
+    if landmark_positions_3d is not None:
+        # Send landmark positions to Unity via UDP
+        data = json.dumps(landmark_positions_3d.tolist())  # Convert to JSON format
+        sock.sendto(data.encode('utf-8'), server_address)  # Send data to Unity
+        print(f'3D Landmarks: {landmark_positions_3d}')  # Optional: Print landmarks to console
+
+    # Display the frame with landmarks drawn
+    cv2.imshow('Real-Time 3D Pose Estimation', frame)
+
+    # Exit loop when 'q' key is pressed
+    if cv2.waitKey(1) & 0xFF == ord('q'):
+        break