[Feature Request] Exclude package caches

[Justinzobel]

Is your feature request related to a problem? Please describe.
Not in relation to a problem, but to conserve data Timeshift could determine the distribution easily and exclude the apt, eopkg, rpm package caches.

Describe the solution you'd like
Include by default package caches in the exclude list.

Describe alternatives you've considered
Users can add them manually but most average users wouldn't know where they're kept.

Additional context
None.

[teejee2008]

Added in the latest commit