Polish Biclops PT unit material

[fspindle]

• Introduce an image to explain where the end-effector frame is located
• Update IBVS example to use a realsense camera and an AprilTag

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (c449424) 54.44% compared to head (4784eb7) 54.76%.
Report is 46 commits behind head on master.

❗ Current head 4784eb7 differs from pull request most recent head 88afa65. Consider uploading reports for the commit 88afa65 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1247      +/-   ##
==========================================
+ Coverage   54.44%   54.76%   +0.32%     
==========================================
  Files         403      403              
  Lines       49841    50248     +407     
==========================================
+ Hits        27134    27520     +386     
- Misses      22707    22728      +21     

see 16 files with indirect coverage changes

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