added "soon alert" widget

filcnaplo_mobile_ui/lib/common/soon_alert/soon_alert.dart

@@ -0,0 +1,22 @@
+import 'package:filcnaplo_mobile_ui/common/action_button.dart';
+import 'package:filcnaplo_mobile_ui/common/soon_alert/soon_alert.i18n.dart';
+import 'package:flutter/material.dart';
+
+class SoonAlert extends StatelessWidget {
+  const SoonAlert({Key? key}) : super(key: key);
+
+  static show({required BuildContext context}) =>
+      showDialog(context: context, builder: (context) => const SoonAlert());
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12.0)),
+      title: Text('soon'.i18n),
+      content: Text('soon_body'.i18n),
+      actions: [
+        ActionButton(label: "Ok", onTap: () => Navigator.of(context).pop())
+      ],
+    );
+  }
+}