Migrating to PathLib instead of os.path

[huguesdevimeux]

The title. A lot of stuff are still using os.path to handle paths, when Pathlib seems to be more appropriate as more recent (and built-in, of course).
In particular, pretty much everything within SceneFileWriter uses os.path.

Very easy PR ;)

[naveen521kk]

(mark it as Hacktoberfest)

[raisultan]

hi👋 @huguesdevimeux, I would love to help!

[naveen521kk]

Sure @raisultan I will assign you.

[raisultan]

@huguesdevimeux, thanks

[leotrs]

@raisultan @digitalvirtuoso what's the status on this?

[digitalvirtuoso]

@leotrs There were still modules that needed os to pathlib. I've been pretty busy lately. I think it was a good time to merge my PR :)

[leotrs]

Thanks for the answer! I'll keep this open then.

[raisultan]

@leotrs, hi! Sorry, I was a bit busy lately, gonna make a PR on the weekend.