Change name of appbar file to mihAppbar and widget name to MIHAppBar

Frontend/patient_manager/lib/components/myAppBar.dart

@@ -1,23 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:patient_manager/main.dart';
-
-class MyAppBar extends StatelessWidget implements PreferredSizeWidget {
-  @override
-  Size get preferredSize => const Size.fromHeight(60);
-
-  final String barTitle;
-
-  const MyAppBar({super.key, required this.barTitle});
-
-  @override
-  Widget build(BuildContext context) {
-    return AppBar(
-      elevation: 8,
-      shadowColor: MzanziInnovationHub.of(context)!.theme.secondaryColor(),
-      title: Text(
-        barTitle,
-      ),
-      centerTitle: true,
-    );
-  }
-}