FSR 2.2 temporal upscaling and antialiasing

[JMS55]

Objective

• Add a new plugin that provides a much better TAA/TSR solution for Vulkan/DirectX12 backends.
• Closes Support for AMD FSR 2.0 #5232 (This is my 3rd attempt, we'll see if third time's the charm 😃)
• Not in scope: FSR3 Frame Generation
  • Same with DLSS, DLSS Frame Generation, XeSS, MTLFXTemporalScaler, and DirectSR/Streamline.

Solution

• Add the fsr_sys crate
• FSR has no official support for Linux, I had to modify the build system to get it to build.
• Add bevy_core_pipeline::FsrPlugin

Wgpu does not have a great interop story with native graphics APIs at the moment. I'm only 30% sure this is in any way sane, and it may break due to horrible race conditions or deadlocks with multithreaded resource access or changes to rendering. I've tried to make it as safe as possible, but it may be breakable if users are doing custom rendering or as the codebase develops over time.

TODO

• Vendor new headers, regenerate bindings, and rebuild static libraries for FSR 2.2
• Finish FsrManager
• Setup ECS systems and render nodes to run FSR for a given camera
• Transparency/reactivity mask support
• User docs
• Validation to prevent API misuse
• Document fsr_sys build process and add windows support
• Ensure everything works on linux, windows, debug, and release profiles
• DirectX12 support
• Multiple camera support (maybe)

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Changelog

• Added bevy_core_pipeline::FsrPlugin and associated types which provides a better TAA/TSR solution than bevy_core_pipeline::TemporalAntiAliasPlugin. FSR is guarded behind the fsr feature flag, and it is only supported on certain platforms - read the docs for details.

[JMS55]

The main blocker at this point is that we don't have any way of overriding rendering to happen at a lower internal resolution, and then upscaling to the camera's target resolution. I've looked into adding support for this, but it gets insanely complicated. I don't know how to solve this.

[JMS55]

I'd still like to implement this, but it requires a lot of work in existing rendering code to support upscaling mid-frame.