feat: initial Speedboard implementation

sitespeed.io web UI with Express/Pug/SQLite — port 3132.
Includes job queue, SSE live log, full metrics dashboard,
site history, CO2/axe/CWV sections, and Docker support.

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

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "speedboard",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "start": "node app.js",
+    "dev": "node --watch app.js"
+  },
+  "dependencies": {
+    "better-sqlite3": "^12.8.0",
+    "express": "^5.2.1",
+    "pug": "^3.0.4",
+    "uuid": "^11.1.0"
+  }
+}