Update to Python 3.13 and RTD config

[dbarrous]

Description:
This pull request updates the project's Python version to 3.13 and makes necessary adjustments to the Read the Docs (RTD) configuration.

Changes Included:

• Python Version Update:

  • Updated the python_version to 3.13 across relevant project files (e.g., tox.ini, Dockerfile, etc.).
  • Verified compatibility of the codebase with Python 3.13.

• RTD Configuration:

  • Updated .readthedocs.yml or conf.py for compatibility with Python 3.13.
  • Adjusted the readthedocs.yml to account for upcoming deprecation: https://about.readthedocs.com/blog/2024/12/deprecate-config-files-without-sphinx-or-mkdocs-config/