Implement Rayleigh distribution in Pytensor

[Dhruvanshu-Joshi]

Description

Incorporate Rayleigh distribution as square root of chi2 distribution with degree of freedom 2. As per the reference.

Related Issue

• [x] Closes #223
• [ ] Related to #

Checklist

• [x] Checked that the pre-commit linting/style checks pass
• [x] Included tests that prove the fix is effective or that the new feature works
• [x] Added necessary documentation (docstrings and/or example notebooks)
• [ ] If you are a pro: each commit corresponds to a relevant logical change

Type of change

• [x] New feature / enhancement
• [ ] Bug fix
• [ ] Documentation
• [ ] Maintenance
• [ ] Other (please specify):

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.81%. Comparing base (c9f5f65) to head (eb1ee57).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #750   +/-   ##
=======================================
  Coverage   80.80%   80.81%           
=======================================
  Files         162      162           
  Lines       46816    46822    +6     
  Branches    11454    11455    +1     
=======================================
+ Hits        37832    37838    +6     
  Misses       6735     6735           
  Partials     2249     2249           

Files	Coverage Δ
pytensor/tensor/random/basic.py	99.05% <100.00%> (+0.01%)	:arrow_up: