Make attractor properties accessible programmatically from Julia and introduced tools to convert a String to the corresponding Julia object.

[fumagall]

There are two contributions:

1. Make attractor properties accessible programmatically from Julia.
2. Introduce tools to convert a String to the corresponding Julia object.

Reason:

1. It is useful to be able to access the values not only from the documentation, and this does not add much complexity.
2. I usually parallelize over models, which constitutes an embarrassingly parallel problem. Therefore, it is easier to leave the parallelization to the resource management of the cluster of choice rather than to Julia. For this, it is handy to choose the attractors via the terminal / via a string. I introduced a list of all available attractors as well as a function that returns the attractor given a string.

For both I added appropriates tests.

[codecov]

Codecov Report

❌ Patch coverage is 89.65517% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.18%. Comparing base (354cde8) to head (c32bc94).

Files with missing lines	Patch %	Lines
src/ChaoticDynamicalSystemLibrary.jl	89.65%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
- Coverage   93.27%   93.18%   -0.09%     
==========================================
  Files           2        2              
  Lines        1992     2010      +18     
==========================================
+ Hits         1858     1873      +15     
- Misses        134      137       +3     

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