[WIP] albedo_rtx: Attempt at generating CWBVH using obvh

[DavidPeicho]

Compiling albedo_rtx with a C++ dependency (tinybvh) to wasm is painful. That would mean albedo is only usable via emscripten. Most rust users compiling to wasm will not use this target anyway, making albedo almost useless for them.

This MR attempts to support a CWBVH implementation from obvh. For now, tinybvh will be used for native targets, and obvh for wasm.

ToDos

• Fix broken primitive
• Ensure traversal speed is roughly in the same ballpark
• Re-create albedo_bvh with features to switch between each implementation
• Generate CWBVH from AABBs