[docs] add sports scheduling tutorial

[odow]

x-ref https://discourse.julialang.org/t/open-source-solver-to-replace-cplex-in-example/137097

x-ref https://publicsectororcourse.wordpress.com/2016/05/09/optimization-in-julia/

cc @etowle here's a blast from the past. I hope you don't mind the usage.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.91%. Comparing base (a554ff3) to head (dae7ced).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4160   +/-   ##
=======================================
  Coverage   99.91%   99.91%           
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  Files          42       42           
  Lines        6229     6229           
=======================================
  Hits         6224     6224           
  Misses          5        5           

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[etowle]

@odow thanks for the ping. I had completely forgotten about that blog post. Of course, you're welcome to use and adapt it however you like.

[odow]

https://jump.dev/JuMP.jl/previews/PR4160/tutorials/linear/sports_scheduling/

I guess I need a longer time limit for the last part.