move from components to authentication package

Frontend/patient_manager/lib/MIH_Packages/authentication/signInOrRegister.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+import 'package:patient_manager/MIH_Packages/authentication/register.dart';
+import 'package:patient_manager/MIH_Packages/authentication/signin.dart';
+
+class SignInOrRegister extends StatefulWidget {
+  const SignInOrRegister({super.key});
+
+  @override
+  State<SignInOrRegister> createState() => _SignInOrRegisterState();
+}
+
+class _SignInOrRegisterState extends State<SignInOrRegister> {
+  bool showSignInPage = true;
+
+  void togglePages() {
+    setState(() {
+      showSignInPage = !showSignInPage;
+    });
+  }
+
+  @override
+  void dispose() {
+    // TODO: implement dispose
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (showSignInPage) {
+      return SignIn(onTap: togglePages);
+    } else {
+      return Register(onTap: togglePages);
+    }
+  }
+}