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/Cargo.toml

@@ -13,6 +13,7 @@ name = "studio-standalone"
 path = "src/main.rs"
 
 [dependencies]
+anyhow = { workspace = true }
 bevy-inspector-egui = "0.21.0"
 bevy_mod_raycast = "0.16.0"
 bevy_rapier3d = "0.23.0"
@@ -24,6 +25,7 @@ parking_lot = "0.12.1"
 serde = { version = "1.0.192", optional = true }
 serde-wasm-bindgen = { version = "0.6.1", optional = true }
 serde_json = { version = "1.0.108", optional = true }
+studio-bvh = { path = "../studio-bvh" }
 wasm-bindgen = "0.2.84"
 web-sys = { version = "0.3.65", optional = true, features = [
 	"CustomEvent",
@@ -44,6 +46,7 @@ wasm = [
 	"dep:web-sys",
 	"bevy_rapier3d/wasm-bindgen",
 ]
+desktop = []
 
 [dependencies.bevy]
 workspace = true