Support editing scenes of any large physical size

[Flarkk]

Follow-up of #99986.

This PR enables rendering and editing arbitrary large scenes and objects in the Editor.

This is especially useful for open worlds, space scenes and alike.

This is achieved by fixing a handful of numerical precision issues :

• Move computations happening in world space to view space
  • Gizmo positionning
  • Gizmo handles picking
  • Objects picking
• Box select of very far away objects
• Orthogonal camera positionning with very large zfar

Depends on :

• Enable rendering with unbounded far distance #99986 (enables large zfar rendering)
• Remove duplicate code between intersects_ray and intersects_segment #100511 (remove numerical precision issues on raycast functions)
• [BVH precision] Make editor gizmos use precision-proof version of BVH::ray_query() #100478 (remove numerical precision issue on gizmo picking)
• Add Camera3D::project_local_ray_origin() #100718 (enables view space raycast)

Demo

large_zfar_editor.zip

Vegetation is ~1m tall and ~10m from the origin
The terrain is 10 km large
The earth's radius is 6,000 km
The moon's radius is 1,700 km and is 400,000 km from the origin
The sun's radius is 700,000 km and is 150 million km from the origin
The Andromeda galaxy is 152,000 light-years wide and is 2.5 million light years from the observer

output.webm