feat!: improve injectPromise - add dataSignal, initialData, ZeduxPromise

[bowheart]

@affects atoms, react, stores

Description

Implement all injectPromise improvements discussed in #220 for Zedux v2:

• Rename initialState to initialData
• Replace the dataOnly with a new dataSignal that's both returned from injectPromise and passed to the promise factory callback function.
• Rework the promise factory's arguments. Instead of receiving a single AbortController, it now receives an object with { controller, dataSignal } properties.
• Create a new ZeduxPromise type that is a drop-in replacement for any atom's Promise generic and holds the type of injectPromise's resolved data value.
  • Improve overloads of useAtomState and useAtomValue to know that the value is resolved when using suspense. Use the new ZeduxPromise type to infer that value.
  • Create a new ResolvedStateOf type helper

Also improve injectStorePromise:

• Rename initialState to initialData
• Add ZeduxPromise types for better hook suspense inference.

I didn't update injectStorePromise to pass the store as an argument to the promise factory. I figure that's an advanced usage and if people want it, we can just say they need to use the signals-based injectPromise instead.