Epiweeks

- Dropped support for Python 3.7 and added support for Python 3.12.
- Changed documentation theme along with other enhancements.

- Dropped support for Python 3.6 and added support for Python 3.11.
- Fixed location of type-checking marker file.
- Added more classifiers to package configuration.
- Updated documentation and removed badges from the package description.
- Updated development configurations and GitHub actions.
- Changed GitHub username back to dralshehri and updated related links.

- Changed package docstrings to Google style and updated documentation.
- Updated development workflows and configurations.
- Other minor fixes and enhancements.
- Changed GitHub username to mhalshehri and updated related links.

- Added `__version__` attribute to the package.
- Changed `Week` rich comparison to return `NotImplemented` when the second
operand is not a `Week` object.
- Changed the project structure by converting the`epiweeks` module into a
package.
- Updated packaging configuration files and local development workflow.
- Updated documentation structure and theme.
- Other minor fixes and enhancements.

- Improved exception messages by including the type or value used.
- Improved PyPI packaging by removing unnecessary files.
- Updated related tests and documentations.

- Fixed some typos.
- Improved documentation.