feat: initial HSAP platform

Huaxu Sentinel Active Safety Platform with embedded algorithm code,
Docker Compose setup, and vendored dataset scaffolds for clone-and-run.

Co-authored-by: Cursor <cursoragent@cursor.com>

platform/web/src/config/featureFlags.ts

@@ -0,0 +1,2 @@
+/** 车道线数据可视化（暂时关闭；恢复时改为 import.meta.env.VITE_LANE_DATA_VIZ === "1"） */
+export const LANE_DATA_VIZ_ENABLED = false;