add interactive method to distributions

[aloctavodia]

closes #144. This allows setting the parameters of distribution interactively using sliders.

There are still some issues, but I left those for future PRs. For example, the user needs to define starting values, but it could be useful to offer some arbitrary values by default, especially for newbie users and/or not very common distributions. There is also a dirty heuristic to define the min, max, and step values of sliders, which could be better, etc.

[codecov-commenter]

Codecov Report

Merging #145 (c23ab15) into main (d65ff34) will decrease coverage by 1.25%.
The diff coverage is 35.08%.

@@            Coverage Diff             @@
##             main     #145      +/-   ##
==========================================
- Coverage   78.71%   77.45%   -1.26%     
==========================================
  Files          18       18              
  Lines        2119     2165      +46     
==========================================
+ Hits         1668     1677       +9     
- Misses        451      488      +37     

Impacted Files	Coverage Δ
preliz/distributions/distributions.py	63.33% <7.50%> (-20.31%)	⬇️
preliz/distributions/continuous.py	98.65% <100.00%> (+<0.01%)	⬆️

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