Add truncated distribution

[aloctavodia]

This is not a distribution per se, instead modifies distributions. For instance

pz.Truncated(pz.Poisson(4.5), 1, 10)

is a Poisson distribution truncated at a lower value of 1 and an upper value of 10.

Methods like plot_pdf and hdi work, but others like mean and variance are not available. It works with pz.maxent or pz.quartile. For maxent the approximation I am using is to comoute the entropy of the underlying untruncated distribution, I need to better understand when this will fail.

This is not intended to replace the distribution TruncatedNormal, while this is a general method to obtain truncated distribution, TruncatedNormal implements methods like mean, entropy, etc not directly available with this general approach

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.69822% with 36 lines in your changes are missing coverage. Please review.

Project coverage is 82.29%. Comparing base (d5b168e) to head (d30b4aa).

Files	Patch %	Lines
preliz/distributions/distributions.py	58.62%	24 Missing ⚠️
preliz/distributions/truncated.py	86.56%	9 Missing ⚠️
preliz/internal/optimization.py	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #370      +/-   ##
==========================================
- Coverage   82.41%   82.29%   -0.12%     
==========================================
  Files          56       58       +2     
  Lines        5231     5388     +157     
==========================================
+ Hits         4311     4434     +123     
- Misses        920      954      +34     

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