feat(mobile): compatibility message warning (#10065)

* feat(mobile): compatibility message warning

* refactor and better signature

mobile/test/modules/utils/version_compatibility_test.dart

@@ -0,0 +1,35 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:immich_mobile/utils/version_compatibility.dart';
+
+void main() {
+  test('getVersionCompatibilityMessage', () {
+    String? result;
+
+    result = getVersionCompatibilityMessage(1, 0, 2, 0);
+    expect(
+      result,
+      'Your app major version is not compatible with the server!',
+    );
+
+    result = getVersionCompatibilityMessage(1, 106, 1, 105);
+    expect(
+      result,
+      'Your app minor version is not compatible with the server! Please update your server to version v1.106.0 or newer to login',
+    );
+
+    result = getVersionCompatibilityMessage(1, 107, 1, 105);
+    expect(
+      result,
+      'Your app minor version is not compatible with the server! Please update your server to version v1.106.0 or newer to login',
+    );
+
+    result = getVersionCompatibilityMessage(1, 106, 1, 106);
+    expect(result, null);
+
+    result = getVersionCompatibilityMessage(1, 107, 1, 106);
+    expect(result, null);
+
+    result = getVersionCompatibilityMessage(1, 107, 1, 108);
+    expect(result, null);
+  });
+}