feat!: make package/app choice explicit

[lsorber]

Significant rework of the template options with breaking changes because template parameters are renamed and options are removed.

Changes:

• Introduce an explicit "project_type": ["package", "app"] choice as the very first choice to make.
• Rename package_(name|description|url) to project_(name|description|url).
• For applications, the latest Python version is selected by default, and for packages 3.10 is selected by default.
• Make docker_image a hidden parameter __docker_image.
• Remove spurious with_jupyter_lab.
• Remove with_pydantic_typing – enabled when selecting with_fastapi_api.
• Remove with_sentry_logging – handholding is of limited value for this feature.
• Remove with_streamlit_app – this is perhaps a little too opinionated as users may want to use Gradio instead.
• Make docstring_style a hidden parameter __docstring_style.
• Update FastAPI template with latest lifecycle best practices.
• Update FastAPI to provide an async endpoint instead a synchronous one, including a CPU-bound method (as that is a footgun with async FastAPI).
• Update Typer template with a more realistic example of how to print output with rich (typer.echo is discouraged now).
• Expanded test matrix to test both package and app scaffoldings.
• Minimum Python version is now 3.9 (needed for asyncio.to_thread and pre-commit).
• Increased support to Python 3.12.

Closes #219.