Find more efficient way of querying for all states + add capabilities for filtering

[scale-tone]

https://github.com/scale-tone/durable-mvc-starter/blob/main/manage-entities/index.ts#L35

DurableClient.getStatusAll() returns the entire set of entities in the hub. Which, of course, will become very slow, once there's a substantial amount of entities created. Need to find a quicker way of retrieving entities of a certain type.

Would also be nice to let the client specify a filter for entities it is interested in.