Add robot_arm_dynamics

[nathanemac]

Add cops3 problem 8

[tmigot]

Thanks @nathanemac ! #161

Could you rename the robot_arm_dynamics by robotarm in all the files (and name of the files) ? So that we match the names in CUTEst.

[tmigot]

And add the following comments at the beginning of the file with the model:

Minimize the time taken for a robot arm to travel between two points.

#  This is problem 8 in the COPS (Version 3) collection of 
#   E. Dolan and J. More
#   see "Benchmarking Optimization Software with COPS"
#   Argonne National Labs Technical Report ANL/MCS-246 (2004)

#  classification OOR2-AN-V-V

[tmigot]

Thanks @nathanemac ! Good job, I just have a couple of comments

[tmigot]

Hey @nathanemac ! Another batch of comment, I checked the whole model also, and it looks good to me.

[codecov]

Codecov Report

Merging #175 (6763a12) into main (594dad3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #175   +/-   ##
=======================================
  Coverage   99.88%   99.89%           
=======================================
  Files         718      721    +3     
  Lines        6281     6364   +83     
=======================================
+ Hits         6274     6357   +83     
  Misses          7        7           

Impacted Files	Coverage Δ
src/ADNLPProblems/robotarm.jl	100.00% <100.00%> (ø)
src/Meta/robotarm.jl	100.00% <100.00%> (ø)
src/PureJuMP/robotarm.jl	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 594dad3...6763a12. Read the comment docs.

[tmigot]

Great job @nathanemac !

I completed the files with some details.