Task: Add TextFormatter function to format the string with args

lib/text_formatter.dart

@@ -0,0 +1,33 @@
+class TextFormatter {
+  String? text;
+
+  TextFormatter(String? text) {
+    this.text = text;
+  }
+
+  String? format(List<dynamic> args) {
+    if (text == null) {
+      return null;
+    }
+
+    var msg = text;
+    args.asMap().forEach((index, element) {
+      msg = msg?.replaceAll('{$index}', element);
+    });
+
+    return msg;
+  }
+
+  String? decorate(Map<String, dynamic> args) {
+    if (text == null) {
+      return null;
+    }
+
+    var msg = text;
+    args.forEach((index, element) {
+      msg = msg?.replaceAll('{$index}', element);
+    });
+
+    return msg;
+  }
+}