v0.1.4 — Repository URL corrections

Housekeeping release. All URLs updated from the old repo name
(Kolmogorov-Arnold-Networks) to the current name (KANX) across README,
pyproject.toml, CHANGELOG, CONTRIBUTING, mkdocs.yml, all docs, the Colab
notebook, and the launch post.

PyPI project URLs (Homepage, Documentation, Repository, Issues, Changelog,
Source Code, Colab Notebook) and all README badges now point to the correct
locations.

Full changelog: https://github.com/Mattral/KANX/blob/main/CHANGELOG.md