Fauxpy

- Add entry for Analysis Mode.
- Refactor code structure.
- Add input validation for command-line arguments.
- Improve the Read the Docs
documentation.
- Update the README files in the
root and triangle example
directory.
- Add `version.py` file to manage FauxPy's versioning.

- Remove tests depending on FauxPy.
- Add Read the Docs documentation.
- Fix a bug in ST.
- Adopt the black code style.
- Add Triangle area example.
- Update readme.

- The first release.