ReactivityKeys: Able to invalidate by namespace

[patroza]

Say I have a key:
["Users", "GetUser", { id: 1 }]

I would like to be able to invalidate:

• ["Users", "GetUser", { id: 1 }] User.GetUser with { id : 1 } query
• ["Users", "GetUser"] all Users.GetUser queries
• ["Users"] all Users queries
• [] all queries

as an alternative, perhaps invalidate on mutation could be a callback, which may inspect all current keys, and return the subset to invalidate.

[tim-smart]

Reactivity supports invalidating namespaces, just need to expose the record syntax in a way that has a stable Hash.

{
  users: [1, 2, 3]
}

That would invalidate both "users", and also nested keys.