refactor: move Config to a separate module

[deltragon]

Description

This PR should not have any behaviour changes at all, simply moving code around to keep related logic together (and move things out of the catch-all utility module).

Unfortunately, since there is already a directory named config, I had to call the module configuration.py.

[deltragon]

@archisman-panigrahi This is ready to be merged, if you agree with the approach.

[archisman-panigrahi]

There is supposed to be no change in user experience, right? Only changes are about how the config is internally saved?

[deltragon]

Well, there shouldn't be any changes in this PR even internally, apart from just moving the code to a separate file.

[archisman-panigrahi]

I deleted all the configs and ran this. Things are working fine. However, it seems that safeeyes is not anymore creating its autostart entry. Is it intentional? Can you please confirm?

[deltragon]

I deleted all the configs and ran this. Things are working fine. However, it seems that safeeyes is not anymore creating its autostart entry. Is it intentional? Can you please confirm?

No, that is not intentional. On first run (when no ~/.config/safeeyes/safeeyes.json exists) it should create the autostart entry (in ~/.config/autostart/io.github.slgobinath.SafeEyes.desktop).
I can't reproduce the issue either. When I delete both ~/.config/safeeyes and ~/.config/autostart/io.github.slgobinath.SafeEyes.desktop, the autostart file does get recreated automatically when I start Safe Eyes on this branch.