refactor: change mesh load pipeline

These changes allow mesh loading to conform even better to the file format, meaning that loading should be more natural and performant.

src/common/material.rs

@@ -1,5 +1,5 @@
-use crate::assets::loaders::mat_loader::MaterialLoadInfo;
 use std::collections::HashMap;
+use crate::assets::loaders::common::MaterialLoadInfo;
 
 pub struct MaterialRegistry {
     materials: HashMap<String, Material>

src/common/mesh.rs

@@ -1,9 +1,9 @@
-use crate::assets::loaders::mesh_loader::MeshLoadInfo;
 use crate::gpu::vertex3::Vertex3;
 use std::collections::HashMap;
 use std::sync::Arc;
 use vulkano::buffer::{Buffer, BufferCreateInfo, BufferUsage, Subbuffer};
 use vulkano::memory::allocator::{AllocationCreateInfo, MemoryAllocator, MemoryTypeFilter};
+use crate::assets::loaders::common::MeshLoadInfo;
 
 /// This struct is slightly misleading - it doesn't actually contain the mesh information, but
 /// the locations of the mesh's information in the overall application's vertex buffer, index buffer,