Fix OptiScaler NGX routing and align marker polling defaults

- Explicitly route OptiScaler to d4r\nvngx.dll in release packages.

- Extract INI generation into a helper that preserves line endings
  and rejects missing or duplicate settings.

- Check NGX routing separately from file presence and return failure
  when the installation is incomplete or misconfigured.

- Add an optional OptiScaler patch for external DLSS backends while
  preserving AMD identity for FSR4, with matching launch guidance.

- Align portable and launcher marker polling defaults at 200 us.

- Log when d4r's model override replaces game or OptiScaler presets.

- Add configuration, package, routing and coexistence regression tests.

- Update installation documentation, add FSR/DLSS comparison videos
  and ignore local .tools artifacts.

Refs: #7, #14

README.md

@@ -31,6 +31,12 @@ For reference, native 2560×1440 without upscaling (the game's TSR at 100%) runs
 
 On the same GPU DLSS starts at a disadvantage: its networks were designed for NVIDIA's tensor cores, and parts of them still run as translated NVIDIA code. How the numbers were measured, and what each optimisation contributed, is in [docs/performance.md](docs/performance.md).
 
+## FSR 4.1.1 vs. DLSS 4.5 comparison
+
+- [Side-by-side comparison: FSR 4.1.1 (left) and DLSS 4.5 preset M (right)](https://cdn.ayois.gay/sk-ant-api03-4Dr0yN5YAzsuAOcyp7KEfeRyB0pbh2iAv2vfywa9QITHIbQScnVQnef9jsxJzDcvWMD13r8C1qGAoQQevjLqzGPT0bAQ9AA)
+- [FSR 4.1.1 standalone video](https://cdn.ayois.gay/sk-ant-api03-YZpWqINTI2HBt6KWJTeyY2b9JJbxUTZdBVRR06KZD7b1x27QLjvQrZZX8Um5sZqkquuOlzJTHUh84FOOLsetNy-PAIiWxAA)
+- [DLSS 4.5 preset M standalone video](https://cdn.ayois.gay/sk-ant-api03-0GLTr6qEYGfUKWYoZeseLdTzPslh1AvlVLdlBEUvV893bi19b7qha5wKnuQXN2tl6l4ffaRKj5warfAFDDjOlYJNYWVQ3AA)
+
 ## Known issues
 
 - In some games using some models native upscaling can show visible artifacting.
@@ -41,6 +47,8 @@ For users who prioritize fidelity over speed, set `[Kernels] PreferAccuracy = tr
 
 d4r builds for RDNA3 and RDNA4. A newly built release compiles native DLSS 4 and 4.5 network kernels for the targets below and selects the matching set at runtime. Only the RX 7700 XT has been tested by this project on a real GPU; an external video reports DLSS 4.5 running through d4r 0.1.2 on an RX 7900 XTX. RDNA4 runtime and performance remain unverified on hardware.
 
+!WE ARE LOOKING FOR VIDEOS OF IT WORKING, IF YOU HAVE A MENTIONED HERE AND DOESNT HAVE A VIDEO PLEASE TAKE ONE!
+
 | GPU | Chip | FP8 math | Runtime testing |
 |---|---|---|---|
 | RX 7700 XT, RX 7800 XT, RX 7700, Radeon PRO W7700 | gfx1101 | widened to f16 | RX 7700 XT only |