Can you please provide a basic example for pyoxidizer?

I'm interested to use pyoxidizer and I have already successfully used `pyoxidizer init-config-file pyapp` on an m1 Mac but honestly the docs start off in parallel with talking about several discrete tools which are supposed to work in concert and then there are no apparent hello-world basic level examples which would be illustrative in each case to a newcomer.

May I suggest examples for the following: pure python module or package, mixed package with extensions, mixed package with extensions and external dynamic or static libs.

Start with the documentation around the `pyoxidizer init-config-file pyapp` workflow and identify where the discrete tools are introduced. Add newcomer-oriented examples covering a pure Python package, extensions, and extensions with external dynamic or static libraries. Done means each requested case has an illustrative basic example in the documentation.

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