Basic resource gathering system:
1. When a resource is selected by a worker, they automatically search for the nearest building (later to be swapped by a special type of building).
2. They move to the resource, gather it up to their weightLimit, then move to the nearest house and drop the resources there.
3. The resources are added to the player's total resources.
4. If this action chain is interrupted by a new command for the worker, it still keeps the resources it currently has.