feat: create tests for all currect functionality and add get available tags router

ref: N25B-334

src/control_backend/api/v1/endpoints/robot.py

@@ -58,6 +58,45 @@ async def ping(request: Request):
     pass
 
 
+@router.get("/get_available_gesture_tags")
+async def get_available_gesture_tags(request: Request):
+    """
+    Endpoint to retrieve the available gesture tags for the robot.
+
+    :param request: The FastAPI request object.
+    :return: A list of available gesture tags.
+    """
+    sub_socket = Context.instance().socket(zmq.SUB)
+    sub_socket.connect(settings.zmq_settings.internal_sub_address)
+    sub_socket.setsockopt(zmq.SUBSCRIBE, b"get_gestures")
+
+    pub_socket: Socket = request.app.state.endpoints_pub_socket
+    topic = b"send_gestures"
+
+    # TODO: Implement a way to get a certain ammount from the UI, rather than everything.
+    amount = None
+    timeout = 5  # seconds
+
+    await pub_socket.send_multipart([topic, amount.to_bytes(4, "big") if amount else b""])
+    try:
+        _, body = await asyncio.wait_for(sub_socket.recv_multipart(), timeout=timeout)
+    except TimeoutError:
+        body = b"tags: []"
+        logger.debug("got timeout error fetching gestures")
+
+    # Handle empty response and JSON decode errors
+    available_tags = []
+    if body:
+        try:
+            available_tags = json.loads(body).get("tags", [])
+        except json.JSONDecodeError as e:
+            logger.error(f"Failed to parse gesture tags JSON: {e}, body: {body}")
+            # Return empty list on JSON error
+            available_tags = []
+
+    return {"available_gesture_tags": available_tags}
+
+
 @router.get("/ping_stream")
 async def ping_stream(request: Request):
     """