Add Supa account and search changes

apps/weblibre/lib/features/bangs/data/models/bang_group.dart

@@ -28,7 +28,8 @@ enum BangGroup {
         'https://raw.githubusercontent.com/FaFre/bangs/main/data/kagi_bangs.json',
     bundled: 'assets/bangs/kagi_bangs.json',
   ),
-  user(remote: null, bundled: null);
+  user(remote: null, bundled: null),
+  weblibre(remote: null, bundled: null);
 
   final String? bundled;
   final String? remote;

apps/weblibre/lib/features/bangs/data/models/web_search_bang.dart

@@ -0,0 +1,24 @@
+import 'package:weblibre/features/bangs/data/models/bang_data.dart';
+import 'package:weblibre/features/bangs/data/models/bang_group.dart';
+import 'package:weblibre/features/bangs/data/models/bang_key.dart';
+
+const webSearchBangTrigger = 'wl';
+
+final webSearchBang = BangData(
+  websiteName: 'WebLibre Search',
+  domain: 'weblibre.eu',
+  trigger: webSearchBangTrigger,
+  // Placeholder template — selecting this bang routes the query through the
+  // token-based search backend instead of opening this URL.
+  urlTemplate: 'https://weblibre.eu/?q={{{s}}}',
+  group: BangGroup.weblibre,
+  searxngApi: false,
+);
+
+final webSearchBangKey = BangKey(
+  group: BangGroup.weblibre,
+  trigger: webSearchBangTrigger,
+);
+
+bool isWebSearchBang(BangData? bang) =>
+    bang != null && bang.group == BangGroup.weblibre;