dave: switch to use standard vertex/index buffers

Fixes: https://github.com/damus-io/notedeck/issues/902
Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_dave/src/lib.rs

@@ -27,6 +27,7 @@ pub use vec3::Vec3;
 
 mod avatar;
 mod config;
+mod mesh;
 mod messages;
 mod quaternion;
 mod tools;