Add support for custom images in Pose2d visualization in odometry

[23Daniel3]

Currently, the Pose2d visualization in odometry provides a graphical representation of the robot's position and orientation on the field. However, it would be interesting to allow users to add custom Pose2d images, similar to how custom robots can be added in the 3D field visualization.
This feature would open up new possibilities, such as adding top-view images of game elements (like objectives or obstacles), providing a clearer and more contextualized representation of the environment.