Inscriptis

This is a maintenance release which fixes a regression in the package dependencies introduced in 2.5.1.
- merged 91 to allow for newer requests versions.

- added Python 3.13 to the build pipeline.
- deprecated Python 3.8.
- updated dependencies.
- minor optimizations in the attribute handling.

- added official Python 3.12 support
- Inscriptis command line client
- renamed `inscript.py` to `inscript` and install client via pip
- added `--timeout` argument.
- Inscriptis Web service:
- migrate the Web service to FastAPI and uvicorn
- enable install as an extra using `pip install inscriptis[web-service]`
- code cleanup
- migrate to `pyproject.toml` and poetry for package distribution
- use black for code formatting
- improved tox config and code checks

Maintenance release adding Python 3.11 to the build pipeline.