feature(rapier): add Attractor component

[AlexWarnes]

UPDATE: I managed to get predictable positioning (i.e. if the <Attractor /> is a child, it will position relative to its parent) and it works as a rigid-body to simulate gravitational interactions. Dynamic range and strength also works as you'd expect.

I'm not sure if I implemented these properly, so let me know. I spent a lot of time with trait components but didn't really understand everything I was reading.

I added the showHelper prop because I think it's useful and convenient, but would be simple to implement by users, so happy to remove it.

Open to all feedback!

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Name	Status	Preview	Updated
threlte	✅ Ready (Inspect)	Visit Preview	Oct 18, 2022 at 3:28AM (UTC)

[AlexWarnes]

Updated with two additional props gravityType and gravitationalConstant

Using realistic gravity was annoying, and I don't think what most people would want so I didn't want that to be the only option. I added descriptions of each type and a controlled example ("Advanced") to the md file! Let me know if it's confusing or needs more work.

[grischaerbe]

Ah and please add a changeset: run npx changeset from the repo root 👍

[AlexWarnes]

• Cleaned up the imports and exports
• Took a shot at the changeset. Did a minor bump for /docs and /rapier and left a short summary but wasn't totally sure how to do all that! Let me know if it needs edits and I'll modify it

[grischaerbe]

Amazing, thank you!