Add screenshots to housekeeping

[danirabbit]

Problem

I always end up taking a ton of screenshots and I just have like hundreds of files that I definitely don't need anymore

Proposal

Would be great to add the screenshots directory to housekeeping

Prior Art (Optional)

No response

[Antolius]

Would this behavior require a new toggle in the Housekeeping view of the System Settings, or would it be enabled by one of existing options (old temporary files perhaps)?

[danirabbit]

@Antolius Yeah I think it should be a new checkbox since it's a different location

[Antolius]

Cool! I'd like to give implementing this a try.

Btw, @danirabbit would you mind me looking into #47 as well? (If you are OK with it in principal I can open a separate PR for that.)