`pyoxidizer run` extra args are ignored

Nobody has claimed this yet.

The PyOxidizer Getting Started docs suggest using `pyoxidizer run -- [args]`:

https://github.com/indygreg/PyOxidizer/blob/0defb06fd21c81dbde43ff8ffddd92ff133ec4c0/pyoxidizer/docs/pyoxidizer_getting_started.rst?plain=1#L330-L350

But it does not actually work. Looking at the code, `pyoxidizer run` does accept extra args, which get passed to `projectmgmt::run` as `_extra_args`:

https://github.com/indygreg/PyOxidizer/blob/0defb06fd21c81dbde43ff8ffddd92ff133ec4c0/pyoxidizer/src/projectmgmt.rs#L142-L171

However, this function does not use them so they just get lost. I looks like the regression was introduced in https://github.com/indygreg/PyOxidizer/commit/df0d459e044419369854918a03baa496d565608c released in 0.5.1. I tried to see quickly if I could fix the issue, but looks like `starlark::eval::EvaluationContextBuilder` does not support extra args at all? I don't know Rust or PyOxidizer enough to tell.

Start with the documented `pyoxidizer run -- [args]` behavior in `pyoxidizer/docs/pyoxidizer_getting_started.rst` and trace the extra-argument handling in `pyoxidizer/src/projectmgmt.rs`. Inspect how `projectmgmt::run` invokes the Starlark evaluation context and whether `EvaluationContextBuilder` can receive arguments. Done means arguments after `--` reach the packaged application as documented.

Written by the indexing model from the issue text.