Apriltag Todo

[cfinn68916]

• [x] fix josh's apriltag problem (and fix calibration file)
• [x] convert everything to cm
• [x] add networktables docs
• [ ] add error_matrix
• [ ] add error threshold value
• [x] add apriltag positions
• [x] finish camera position work

If you are looking for more things to do, check for "TODO:" in any python files