How do I run my application?

I tried a minimal example having a single file `hello.py`

```
#!/usr/bin/env python3

def main():
print("Hello world!")

if __name__ == "__main__":
main()
```

But getting a repl when runnind `pyoxidizer run` isn't what I want. I tried to use `run_module`, and `run_eval` but was not able to get my mini application to run.

Any hints welcome.

Start by reproducing the minimal `hello.py` example with `pyoxidizer run`, then trace how the `run_module` and `run_eval` entry points are documented or handled. Clarify the supported way to launch a single-file application instead of a REPL, and document or test the resulting workflow.

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