feature(data): add types to dispatch and select

[johnhooks]

What?

Add TypeScript types to dispatch and select of @wordpress/data.

Why?

I and others are using these function with custom stores and would like to use them fully typed. I am currently hacking the type system to accomplish this in the wp-feature-notifications project, but it would be better if these were typed correctly.

How?

I moved the functions to individual TypeScript files because I couldn't provide the correct generic arguments in the index.js file like in useSelect because the types would be exports from packages with the generic arguments. Moving them to a separate file solved this issue, I made them individual files because it seemed appropriate.

@swissspidy @adamziel @dmsnell

Issues

The automatically built docs don't appropriately show the generic type arguments.

[github-actions]

👋 Thanks for your first Pull Request and for helping build the future of Gutenberg and WordPress, @johnhooks! In case you missed it, we'd love to have you join us in our Slack community, where we hold regularly weekly meetings open to anyone to coordinate with each other.

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[swissspidy]

Awesome, thank you! I‘ll give this a try as soon as I am back from vacation.

I think after this, thunks are the remaining main thing still without proper types.

[swissspidy]

This seems to work well in my project 👍

[johnhooks]

@swissspidy that's awesome. This is my very first PR to Gutenberg that has had an "approved" review! I'm really new to this, what is the next step?

[swissspidy]

Normally I would just merge the PR, but since I am not super familiar with the data package and its types, it would be great to wait for another review, ideally by a code owner.

[adamziel]

Looks good, thank you!

[johnhooks]

I'm so pumped, my first ever PR merged into Gutenberg 🎉