init: personal markdown knowledge base server

- Auto-discovers .md files from configurable content roots
- On-the-fly markdown → HTML rendering (marked + highlight.js)
- Directory tree navigation sidebar
- Full-text search across all documents
- Dark mode, responsive design, Ctrl+K quick search
- Frontmatter (YAML) support via gray-matter
- Configurable via config.json

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

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "kb-server",
+  "version": "1.0.0",
+  "description": "Personal Markdown Knowledge Base — universal .md file renderer and blog",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.21.0",
+    "marked": "^14.0.0",
+    "highlight.js": "^11.10.0",
+    "gray-matter": "^4.0.3"
+  }
+}