add msg definition for Mecanum Wheel Odometry

Signed-off-by: Aleksander Szymański <bitterisland6@gmail.com>

leo_msgs/msg/WheelOdomMecanum.msg

@@ -0,0 +1,14 @@
+# This message represents the pose and velocity of a mecanum wheeled robot, estimated from the wheel encoders.
+#
+# The velocity_* fields represent the linear and angular velocity of the robot.
+# The pose_* fields represent the x, y and yaw pose of the robot w.r.t. the starting pose.
+#
+# The coordinate frame that represents the robot is located at the center of rotation.
+
+time stamp
+float32 velocity_lin_x
+float32 velocity_lin_y
+float32 velocity_ang
+float32 pose_x
+float32 pose_y
+float32 pose_yaw