Workgroup lifecycle

With the recent shift to the Working Groups model for implementing and reviewing projects within Bitcoin Core, it may be worth reconsidering the lifecycle of working groups in this forum.

For example, while the wg-cluster-mempool group has closed here, it still exists within the Working Groups structure of Bitcoin Core, reflecting a change in how projects are organized. Having a central reference point for each group could help interested parties follow progress more easily and lower the barrier to entry.