Add a CLI interface

[etrotta]

Adds a minimal CLI interface using argparse, to include example usage within the package + serve as a quick way to verify if you installed correctly + any quick testing involving kokoro

Example usage:

python3 -m kokoro --text "The sky above the port was the color of television, tuned to a dead channel." -o file.wav --debug

echo "Bom dia mundo, como vão vocês" > text.txt
uv tool install --with pip --no-build-isolation .
kokoro -i text.txt --voice pm_alex -o audio.wav

Also migrates the packaging configuration to use pyproject.toml with hatch + uv, removing setup.py and setuptools

Originally I was going to try and stick with setuptools over forcing what I personally consider to be best practices, but when I saw that misaki already uses uv+hatch I figured I may as well do it.

Regarding the minimum version bump, 3.10 was the oldest version I could set it to without uv complaining, not sure if you could set it to 3.9 but even the numpy version currently required has dropped support for 3.8 and older so it's going to have to be either 3.9 or 3.10

[etrotta]

Side note: I also suffered from explosion/spaCy#13747 while testing, probably shouldn't be a huge issue though

[hexgrad]

Thanks for the PR. Will merge this in ~3 hours at 9 PM PST

[rapjul]

Side note: I also suffered from explosion/spaCy#13747 while testing, probably shouldn't be a huge issue though

I needed to use this command to get pip included in the program when using uv:

uv tool install --python 3.12 --with pip kokoro