Cannot run default project from `init-config-file` and no stack trace

Attempting to build a newly-created project from `init-config-file`, on macOS 10.14 and with pyoxidizer 0.11.0, with `run` produces:

```
error[PYOXIDIZER_PYTHON_EXECUTABLE]: could not execute command: No such file or directory (os error 2)

Caused by:
No such file or directory (os error 2)
--> ./pyoxidizer.bzl:270:5
|
270 | files.add_python_resource(".", exe)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ to_file_manifest()

error: could not execute command: No such file or directory (os error 2)

Caused by:
No such file or directory (os error 2)
```

I assume it's the exe that it can't find but there's not much in the way of a stack trace that would allow me to dig deeper into the issue.

Start by reproducing the `run` command from a project created with `init-config-file`, then inspect `./pyoxidizer.bzl` at line 270 where `files.add_python_resource` reports the failure. Done means the default generated project runs successfully or reports an actionable stack trace identifying the missing executable.

Written by the indexing model from the issue text.