Add `gds#find`

Based on feedback from @maxdemarzi, introduce a `gds#find` method that replaces `gds#findNodesByLabelAndProperty` and `ggo#getAllNodesWithLabel`.
I'm wondering if we should have it be findNodes() though. That way we have the path open to adding findRelationships (and findNode and findRelationship for single lookups), and those names will align with the existing API in calling out what type of entity we're dealing with. While #find is really clean, having it be too generic risks coming back to bite us - there's a lot of things that can be found in the database