Custom constraints : add tests

[franckgaga]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.22222% with 1 line in your changes missing coverage. Please review.

Project coverage is 98.71%. Comparing base (58191fd) to head (547d2f2).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/controller/execute.jl	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
+ Coverage   98.28%   98.71%   +0.43%     
==========================================
  Files          24       23       -1     
  Lines        3664     3666       +2     
==========================================
+ Hits         3601     3619      +18     
+ Misses         63       47      -16     

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[franckgaga]

#118 continuing the conversation here @baggepinnen

You can see the last version of the doc here:

https://juliacontrol.github.io/ModelPredictiveControl.jl/previews/PR128

[baggepinnen]

Nice, this new feature is a nice addition!

Here

I find it a bit hard to understand what format the bold-face arguments come in, there are bold and non-bold face, capital and non capital letters. I assume these all mean something but I'm not sure what. They are somewhat defined at the top of the page in which the docstring appears, but it's still somewhat unclear since the entries in these arrays

are themselves arrays, making the layout of the outer array somewhat undefined. For example, is $U \in \mathbb{R}^{H_c n_u}$ or $U \in \mathbb{R}^{H_c \times n_u}$ or is $U$ a vector of vectors?