I had to remove the `bin/gherkin` executable since that doesn't work with pyproject.toml (scripts can only be python entrypoints). But I replaced with the correct annotation in pyproject.toml, so if you install the package, the script will be automatically installed in the venv too

We don't need to distribute these scripts as entry points. It's unlikely that any of our users need these, as they are just used internally for acceptance test.

Instead, let's move them to the package `gherkin.scripts`, and invoke them using `python -m gherkin.scripts.xxx`

No need to distribute them, as they are for internal tests

…ing `pyproject.toml`

…ge underneath)

…kin` package