BVH animation loading / retargeting (#25)

This PR adds support for BVH animation files, with a custom animation
player and retargeting solution for our Blender Rigify-based skeletal
meshes.

---------

Co-authored-by: Brooks Palin <brookspalin710@gmail.com>

studio-bvh/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "studio-bvh"
+version = "0.1.0"
+edition = "2021"
+authors = [
+	"George Burton <burtonageo@gmail.com>",
+	"Storyteller.ai",
+]
+
+[dependencies] # TODO: Update dependencies
+bstr = "0.2"
+lexical = "5.2"
+nom = "6"
+smallvec = "1.5"