Engine: native presets K and M in the D3D12 shim, wider game coverage

A standalone Vulkan inference engine (engine/) for DLSS presets K and M that
runs from weights extracted from the user's own nvngx_dlss.dll, with d4r's
own input, network and reconstruction shaders or the native HIP network
layers, recorded into the game's command list by the shim. Opt-in
([Engine] Enabled / D4R_ENGINE=1); anything uncovered falls back to the
CUDA/ZLUDA path with the reason logged.

Byte-identical to NGX's CUDA backend under the phase-capable reference
(1706x960 -> 2560x1440, native HIP network, eleven frames, RX 9070 XT):
- K render- and display-resolution motion vectors, HDR and LDR
- K game-supplied exposure and automatic exposure with any pre-exposure
  and exposure scale (one residual: effective exposure exactly 2 or 4)
- K and M with the DLSS indicator's inverted-axis parameters
- M with any exposure settings (NGX ignores them for M)
K packages need the current compile_k.py (marker D4RO0003).

Also: HIP shared buffers are pooled across feature recreation (ROCm leaks
destroyed imports), hipnet.bin must match the preset, M-only games do not
load the K model, install_d4r_runtime.sh stages k, k-ldr, m, m-ldr with
hip/, the activation table has a generator (gen_activation_m.py), and
package_release.sh can bundle the engine's shaders (never its weights).

Signed-off-by: woutermans <[email protected]>

.gitignore

@@ -8,6 +8,8 @@
 *.cubin
 *.fatbin
 *.nvngx
+# NVIDIA's NGX/DLSS SDK headers (the probes in tools/ build against the user's own copy)
+nvsdk_ngx*.h
 
 # Local captures, dumps, traces, and build products
 /captures/
@@ -35,4 +37,11 @@ videos/
 /kernels/out/
 *.hsaco
 *.ptx
-/kernels/extracted/
+/kernels/extracted/
+# Native engine models: weights and tables read from NVIDIA's DLSS, and shaders compiled next to them
+weights.bin
+offsets.bin
+lut.bin
+hipnet.bin
+model.json
+*.spv