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]>

engine/normalized_store.glsl

@@ -0,0 +1,22 @@
+// Match formatted CUDA stores before the Vulkan image conversion. The reference rounds halfway away from
+// zero; feeding an exact normalized code to imageStore also avoids implementation-specific UNORM/SNORM rounding.
+vec4 unorm8Value(vec4 v) {
+    v = clamp(mix(v, vec4(0.0), isnan(v)), 0.0, 1.0);
+    precise vec4 scaled = v * 255.0;
+    return floor(scaled + 0.5) * (1.0 / 255.0);
+}
+vec4 snorm8Value(vec4 v) {
+    v = clamp(mix(v, vec4(0.0), isnan(v)), -1.0, 1.0);
+    precise vec4 scaled = abs(v) * 127.0;
+    return sign(v) * floor(scaled + 0.5) * (1.0 / 127.0);
+}
+vec3 unorm10Value(vec3 v) {
+    v = clamp(mix(v, vec3(0.0), isnan(v)), 0.0, 1.0);
+    precise vec3 scaled = v * 1023.0;
+    precise vec3 code = floor(scaled + 0.5);
+    precise vec3 value = code * (1.0 / 1023.0);
+    // CUDA's float-backed formatted surface stores code/1023 with correctly rounded division. RADV lowers
+    // even precise constant division to reciprocal multiplication (24/1024 codes differ by one ulp).
+    // Correct the quotient with its fused residual; all 1024 normalized codes then match bit-for-bit.
+    return fma(fma(value, vec3(-1023.0), code), vec3(1.0 / 1023.0), value);
+}