Add moment matching

[aloctavodia]

Add function to perform moment matching.

dist0 = pz.Normal(14, 1)
dist = pz.Gamma()
pz.match_moments(dist0, dist, moments="mv")

• Renames internal function optimize_moments to optimize_mean_sigma
• ToDo: Add test, update docs.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 94.79769% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.76%. Comparing base (447e17e) to head (c1739f6).

Files with missing lines	Patch %	Lines
preliz/unidimensional/matching.py	90.14%	7 Missing ⚠️
preliz/distributions/binomial.py	66.66%	1 Missing ⚠️
preliz/ppls/pymc_io.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #699      +/-   ##
==========================================
+ Coverage   73.43%   73.76%   +0.33%     
==========================================
  Files         108      110       +2     
  Lines        9112     9254     +142     
==========================================
+ Hits         6691     6826     +135     
- Misses       2421     2428       +7     

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