[WIP] Project Structure: Separating modules into Foundation, Core and eventually Plugins. Assets, resources, ecs components will all be defined as plugins, including transform and rendering

[FEAT] Assets: Changed AssetHeader decoding to scan for nullchar instead of binary size in begining of file

[FIX] GpuBackend: Fixed issue with GpuCmdPushConstant taking in a non-owning Span<Byte> which got out of scope before the GpuCmds got executed

[REFACTOR] GpuBackend: unified flags and enums for image layout and usage to a single GpuResourceState bitflag

[FEAT] Render: Fixed incorrect texture loading due reliance on the name field in gltf files instead of uri