Rewrite sorry/unsorry in python

[jvperrin]

Currently sorry and unsorry are pretty complicated scripts to be written in bash and have commented out sections, shellcheck-ignored warnings, etc. It's also tough to know if things done in the sorry script are undone properly in the unsorry script (setting file permissions for instance), so rewriting these two to use common functions and better error handling (maybe even be in the same script file) would be useful.

[fawaf]

oh wow, unsorry/sorry is still that terrible bash script? nice.

[jvperrin]

Yup, exactly, every time I have to look at it or use it and it breaks halfway through I get sad :'(