Add DLSS Frame Generation support - #34
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Objective
Add DLSS Frame Generation support to dlss_wgpu.
Solution
A new
frame_generationmodule wraps NGX Vulkan Frame Generation, with oneEvaluateFeaturecall per generated frame for 2x, 3x, and 4x modes. Apresent_meteringmodule adds VK_NV_present_metering so generated frames can be paced evenly, though chaining it onto a present needsSurface::set_next_present_chainfrom wgpu 31 (gfx-rs/wgpu#9847).I'll follow-up w/ Reflex support in a follow-on PR.
Testing
This PR was built by me with the assistance of Claude Code w/ Fable 5