fix(functors): remove custom theme link

docs(readme): updating README.md for fp course

Merge remote-tracking branch 'upstream/main' into fp/functors

Merge branch 'main' into fp/applicatives

refactor(functors): `v0.1.4` of notebook `functors` for fp course

refactor(functors): `v0.1.3` of `functors` notebook

Update README.md - fix typo in links

Update functional_programming/06_applicatives.py

refactor(applicatives): `v0.1.3` of `applicatives.py`

refactor(applicatives): remove `sequenceL` from `Applicative` because it should be a classmethod but can't be generically implemented

docs(applicatives): add this notebook to course's README

refactor(functor): migrate to python3.13

fixing typo

Add 0.1.0 version of notebook 06_applicatives for fp course

fix(CHANGELOG): reverse the order of CHANGELOG

refactor(fp): v0.1.1 of notebook 05_functors.py

Fixing typo

Improve notebook and README as suggested by Haleshot

Update README and CHANGELOG

Add notebook 05_functors (version 0.1.0) for the functional programming course

Add CHANGELOG

Remove duplicate implementations in markdown

Demo version of 05_functors.py