Retrieve and publish camera images from robot

[PedroS235]

Describe the solution you'd like
The Unitree Go1 is equipped with a set of 5 binocular fisheye cameras. They however are not being published by this package. These cameras can provide good information about the surroundings of the robot, which can be used for many purposed.

Describe alternatives you've considered
An attempt at this was already made, however not successful. This, to my knowledge, requires fiddling with the UnitreeCameraSDK on the internal computers. Thus, this requires a bit of research on how this can be achieved.

Additional context
Relatively new documentation is now provided here by the unitreerobotics team, which includes instructions to use the UnitreeCameraSDK.