Add Pi dataset

[Volcanes]

Describe your changes

Add Pi dataset

Checklist

• Test cases have been modified/added to cover any code changes.
• Docstrings have been modified/created for any code changes.
• All linting and formatting checks pass (see the contributing guidelines for more information).

[github-actions]

Congratulations on making your first pull request to Data Morph! Please familiarize yourself with the contributing guidelines, if you haven't already.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.41%. Comparing base (51b8d26) to head (8459320).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #193      +/-   ##
==========================================
- Coverage   98.42%   98.41%   -0.01%     
==========================================
  Files          43       43              
  Lines        1775     1765      -10     
  Branches      358      356       -2     
==========================================
- Hits         1747     1737      -10     
  Misses         25       25              
  Partials        3        3              

Files	Coverage Δ
src/data_morph/data/loader.py	100.00% <ø> (ø)

[stefmolin]

This looks great, @Volcanes – thank you!