### Request type Fix ### What needs to get done overlay-packages in a part appears to be commonly used - eg. here: https://github.com/canonical/ceph-containers/blob/234fd0c1d9d5770fb6497750c0504a4ec501b718/rockcraft.yaml#L33 However, this is not referenced in the reference documentation for rockcraft.yaml: https://canonical-rockcraft.readthedocs-hosted.com/en/latest/reference/part_properties/#part-properties With more searching around, I see there are things like the overlay step which has overlay-packages, overlay-script, etc. referenced: https://canonical-rockcraft.readthedocs-hosted.com/en/latest/explanation/overlay-step/#overlay-parameters , but this is not in the reference docs, and thus difficult to find. ### Documentation location _No response_ ### Additional information _No response_