filter.loading promise result should call filter.get()

[BerkliumBirb]

In next version { isLoading: true } is typed separately from { isLoading: false, isEmpty: boolean, list: ... }. That makes TypeScript freak out when you write something like this:

const filter = createFilter(client, Template, { field: "something" })
await filter.loading
filter.get().list
//            ^ Error: list is not defined on { isLoading: true }

It would be easier to write this instead:

const value = await filter.loading
//        ^: { isLoading: false, isEmpty: boolean, list: ... }

[ai]

const value = await filter.loading

Interesting idea!

Also, next has await loadValue() and ensureLoading (for tests)

[ai]

Adding await filter.loading is hard because of how Promise work and that we use lazy stores.

Please use value = await loadValue(store) it does exactly what do you need.