feat(atoms)!: support @atom node type filter in findAll and dehydrate

[bowheart]

Description

Zedux's "built-in devtools", ecosystem.findAll and ecosystem.dehydrate received some upgrades for v2. But hitherto, there was still no good way to make them return only atoms.

While #201 made all other node types easier to search for by simply passing an @ prefix, it did not give atoms an @atom prefix. I think it still makes sense that these methods should accept @atom specifically.

So: Give both findAll and dehydrate an overload for TS auto completion of the node types. Handle the @atom string specifically.

ecosystem.findAll('@atom') // get a list of all atom nodes
ecosystem.findAll('@selector') // get a list of all selector nodes
ecosystem.findAll('@component') // get a list of all React component nodes
ecosystem.findAll({ include: ['@atom', '@signal'] }) // get a list of all atom or signal nodes
ecosystem.findAll({ exclude: ['@component', '@selector'] }) // get all nodes but components/selectors

ecosystem.dehydrate works exactly the same (but returning an object with dehydrated state values).

Breaking Changes

To better support custom ids where you might have to manually filter nodes yourself, ecosystem.findAll now returns an array instead of an object keyed by node id.

Before, you'd have to use Object.values to get the list of returned nodes for manually iterating. That was annoying. Now this API more closely aligns to document.querySelectorAll which is probably where the *All namesake came from.

// before:
const nodes = Object.values(ecosystem.findAll('my/atom/key')).filter(myCustomFilter)
// after:
const nodes = ecosystem.findAll('my/atom/key').filter(myCustomFilter)

In particular, I did this all the time:

console.log(Object.values(ecosystem.findAll('my/namespace')).map(({ id }) => id))
// now it's:
console.log(ecosystem.findAll('my/namespace').map(({ id }) => id))

Additonally, making the @atom string filter by all atoms is technically a breaking change. It's a best practice to not use the @ character in atom keys/manual id strings so Zedux can add features like this.