Standalone executable

[kissgyorgy]

We want to make it possible to run unblob in many environments easily.
PyOxidizer is a great tool to making fully standalone ELF binaries: https://github.com/indygreg/PyOxidizer

[kissgyorgy]

I really want to do this before launching v1.0, so people can try it out easily without relying on a specific installed version of Python.

[kissgyorgy]

We want to use unblob in production, so it is confirmed that we need to try this before v1.0 release.

[kissgyorgy]

I renamed the title, because the point is not to use a specific technology, but make it very convenient for end-users. We tried snap packages and it seems easy to implement. We also want to do Flatpack.