Add 3D loose-leaf chronicle of human civilisation

A Three.js site presenting 20 world history milestones as
double-sided loose-leaf pages, with three views: a leather
binder with page-flip animation, a golden timeline, and a
dotted globe with great-circle arcs.

All textures (paper, leather, registration cards, and 18
hand-drawn sketches) are generated procedurally via Canvas
2D, so no external image assets are needed beyond the Earth
map. Includes dev helper scripts for screenshots, ASCII
previews, and headless verification.

package.json

@@ -0,0 +1,20 @@
+{
+  "name": "hist-leaves",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "description": "人类文明里程碑 · 活页编年史 — 一个以活页本、时间轴与地理视图呈现世界历史的三维网站",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "three": "^0.170.0"
+  },
+  "devDependencies": {
+    "pngjs": "^7.0.0",
+    "puppeteer-core": "^25.11.0",
+    "vite": "^6.0.0"
+  }
+}