feat: add setup wizard to webpack build and manifest

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

extension/manifest.json

@@ -24,5 +24,9 @@
   }],
   "content_security_policy": {
     "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'"
-  }
+  },
+  "web_accessible_resources": [{
+    "resources": ["setup.html", "setup.js", "styles.css", "idfoto_wasm_bg.wasm", "idfoto_wasm.js"],
+    "matches": ["<all_urls>"]
+  }]
 }