Add Python test scripts for CAN communication

- Created `python_can.py`:
  - Implements a CAN message receiver that processes angle, velocity, and enable/disable flags.
- Added `python_enable_motor.py`:
  - Sends enable/disable commands to the motor via CAN.
- Added `python_send_angle.py`:
  - Sends target angle commands over the CAN bus.
- Added `python_send_velocity.py`:
  - Sends target velocity commands over the CAN bus.
- Configured all scripts to use `python-can` library with `socketcan` interface for CAN communication.

controller/fw/embed/test/python_send_velocity.py

@@ -0,0 +1,34 @@
+import can
+import struct
+import time
+
+# Function to send the target speed
+def send_target_speed(bus, target_speed):
+    msg = can.Message()
+    msg.arbitration_id = 1  # Message ID
+    msg.is_extended_id = False
+    msg.dlc = 5  # Message length
+    msg.data = [ord('V')] + list(struct.pack('<f', target_speed))  # 'V' for the command identifier, followed by the speed in float format
+
+    try:
+        bus.send(msg)
+        print(f"Sent message with target speed: {target_speed} m/s")
+        print(f"Message data: {msg.data}")
+    except can.CanError:
+        print("Message failed to send")
+
+def main():
+    # CAN interface setup
+    bus = can.interface.Bus(channel='can0', bustype='socketcan', bitrate=1000000)  # Ensure the bitrate matches the microcontroller settings
+    print("CAN bus initialized, sending target speeds...")
+
+    # Target speed
+    target_speed = 0.0  # in meters per second
+
+    # Loop to send messages
+    while True:
+        send_target_speed(bus, target_speed)
+        time.sleep(1)  # Delay before sending the next message
+
+if __name__ == '__main__':
+    main()