object type factories

[harrysolovay]

Every object type should overlap a factory. One can use the type modifier should they only want the TS type.

- import { CollectionConfig } from "@capi/rococo-dev/westmint"
+ import { type CollectionConfig } from "@capi/rococo-dev/westmint"

Let's consider the NFTs pallet usage.

Nfts.create({
  config: Rune.rec({
    settings: DefaultCollectionSetting.AllOff,
    mintSettings: Rune.rec({
      mintType: MintType.Issuer(),
      defaultItemSettings: DefaultItemSetting.AllOn,
    }),
  }),
  admin: alexa.address,
})

There's no autocompletion inside of Rune.rec. Yes, one gets a type error should they supply invalid fields, but that's not a great DX.

The alternative:

Nfts.create({
  config: CollectionConfig({
    settings: DefaultCollectionSetting.AllOff,
    mintSettings: MintSettings({
      mintType: MintType.Issuer(),
      defaultItemSettings: DefaultItemSetting.AllOn,
    }),
  }),
  admin: alexa.address,
})

This requires one import the CollectionConfig and MintSettings types/factories. However, the experience ends up being much smoother and more closely resembles the Rust equivalent. Also, we can in most cases forgo importing Rune.