fix: permissions of shell completion files

[bchmnn]

This PR adds os.chown calls for the shell completion files. This is due to isisdl may be installed in a read-only way (e.g. on NixOS).

This may lead to problems that:

1. shutil.copy preserves the ownership flags of the files that are being copied
2. the source shell completion files are read-only; therefore, the shell completion files in .local/share/... are read-only
3. on the second run isisdl tries to override shell completions files in .local/share that are read-only; isisdl fails.

This PR simply updates the ownership flags of the copied files in .local/share/... to be RW for the owner.

PS: Once this is hopefully merged and released, I'll add isisdl to nixpkgs (NixOS packet manager). :)

[Emily3403]

Great, thanks a lot! Thank you for fixing this 😊

[bchmnn]

@Emily3403 apparently the ci/cd failed? You sure it is ready for merging?

[Emily3403]

Yes, because secrets are not transferred when running workflows from a PR. I don't really have a clue how to fix this, so I checked it out locally and everything worked fine. The resulting action completed successfully.

[bchmnn]

Ah okay. Makes sense :)
Awesome. You can ping me, once the new release is on PyPi. Then I'll package isisdl for NixOS.

[Emily3403]

Should be released now