prepare for multiple apps

apps/weblibre/lib/extensions/string.dart

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2024-2026 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+extension StringExtension on String {
+  String toCapitalized() =>
+      isEmpty ? this : '${this[0].toUpperCase()}${substring(1)}';
+
+  bool startsWithIgnoreCase(String prefix) =>
+      toLowerCase().startsWith(prefix.toLowerCase());
+}