Set up book project: Markdown→CSS→PDF pipeline for KDP

Adds the full authoring and build toolchain for "Das Kaleidoskop der
Schlummerwelten" — all 12 story content files in Markdown, Nunjucks
HTML templates, CSS print layout, and Puppeteer-based PDF generation
targeting Amazon KDP (8.5×8.5 in, 0.125in bleed).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -0,0 +1,21 @@
+{
+  "name": "kaleidoskop-der-schlummerwelten",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "node scripts/build.js",
+    "pdf": "node scripts/pdf.js",
+    "book": "pnpm build && pnpm pdf",
+    "watch": "node --watch scripts/build.js"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": ["puppeteer"]
+  },
+  "dependencies": {
+    "gray-matter": "^4.0.3",
+    "marked": "^12.0.0",
+    "nunjucks": "^3.2.4",
+    "puppeteer": "^24.42.0"
+  }
+}