EnvironmentControls: Allow for double-tap to zoom

[gkjohnson]

Ala Google Maps and other maps platforms. Need an option to disable it or cancel the behavior in case users are including this interaction in their apps. Must also animate to the target position.

[pizza3]

Screen.Recording.2026-01-12.200522.mp4

wanted to confirm the implementation before making pr @gkjohnson

1. Tap Detection: When user lifts finger, checks if second tap occurred within 300ms at same location (±10px) as first tap
2. Target Acquisition: Raycasts from tap position to find 3D point in scene; if hit, zooms toward that point, otherwise zooms toward camera direction
3. Animation Setup: Calculates start/target values (zoom property for ortho camera, or distance for perspective camera) and clamps to min/max limits
4. Frame-by-Frame Update: Each frame interpolates between start→target using ease-out cubic easing (starts fast, ends slow)
5. Camera Movement: Updates camera.zoom (orthographic) or moves camera.position along direction vector (perspective) until animation completes after 300ms.

[gkjohnson]

Thanks @pizza3! This sounds great - my only question is about the animation and how that's handled. But I think seeing a PR will make that more clear.