Add fast_ddrive project page with YouTube hero embed

Author: lawrence-cj

fast_ddrive/README.md

@@ -0,0 +1,24 @@
+# Fast-dDrive Project Page
+
+Static site for the Fast-dDrive paper. Layout adapted from the
+[Fast-dVLM project page](https://nvlabs.github.io/Fast-dLLM/fast_dvlm/).
+
+## Structure
+- `index.html` — main page
+- `asset/` — figures (PNG), demo videos (MP4)
+
+## Local Preview
+```bash
+cd webpage
+python3 -m http.server 8000
+# open http://localhost:8000
+```
+
+## Assets sourced from the paper repo
+- `fast-dDrive-teaser.png` — speed/accuracy frontier
+- `fast-ddrive-pipeline.png` — overall pipeline
+- `scaffold_spec.png` — Scaffold Speculative Decoding diagram
+- `inference_scaling_curve.png`, `variance_reduction_curve.png` — Test-time scaling plots
+- `ss_multi_rollout_wrapfig_updated.png` — Multi-rollout qualitative
+- `demo_compare.mp4` — Fast-dDrive vs Qwen2.5-VL-3B AR baseline (40s)
+- `demo_5hz.mp4` — 5Hz dense playback on a Waymo scene