* Accept `#[rust_gpu::spirv()]` attributes rather than `#[spirv()]` in backend
* Implemented `#[spirv(..)]` proc macro attribute for all platforms that conditionally translates to `#[rust_gpu::spirv()]` based on platform
* Changed `SpirvBuilder` to always apply `register_tool(rust_gpu)` attribute to shader crates
* Updated docs
* Added changelog