Merge branch 'henri2h/search-remove-diacritics' into 'main'

Search: remove diacritics

See merge request famedly/fluffychat!809

lib/utils/string_extension.dart

@@ -0,0 +1,15 @@
+extension StringCasingExtension on String {
+  String removeDiacritics() {
+    const withDia =
+        'ÀÁÂÃÄÅàáâãäåÒÓÔÕÕÖØòóôõöøÈÉÊËèéêëðÇçÐÌÍÎÏìíîïÙÚÛÜùúûüÑñŠšŸÿýŽž';
+    const withoutDia =
+        'AAAAAAaaaaaaOOOOOOOooooooEEEEeeeeeCcDIIIIiiiiUUUUuuuuNnSsYyyZz';
+
+    String str = this;
+    for (int i = 0; i < withDia.length; i++) {
+      str = str.replaceAll(withDia[i], withoutDia[i]);
+    }
+
+    return str;
+  }
+}