Add first person 3D eye-camera

[emilk]

What

• Closes Add mode for first-person camera control #1879

This adds a first-person mode to the eye-camera, selectable in the selection panel.

first-person-camera.mp4

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using newly built examples: app.rerun.io
  • Using examples from latest main build: app.rerun.io
  • Using full set of examples from nightly build: app.rerun.io
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!

• PR Build Summary
• Docs preview
• Examples preview
• Recent benchmark results
• Wasm size tracking

[Wumpf]

would be nice if arrow keys worked alongside WASD :)

[emilk]

would be nice if arrow keys worked alongside WASD :)

I'd rather not move the goal post for this PR unnecessarily.

Sure it would be nice, but the arrow keys currently moves widget focus, so we would need some logic for when the arrow keys do what.

[Wumpf]

default width for selection panel cuts the control off

[Wumpf]

Q/E for up/down is faster on orbital than on 1st person

[Wumpf]

Q/E for up/down is faster on orbital than on 1st person

after having read the code I understand why and it kinda makes sense, we have to anchor the speed on different things 🤔

Great to finally have this. All good, the only thing bugging me a bit is the selection panel layout