implemented map view with markers for every floodstation

lib/widgets/custom_marker.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+class CustomMarker extends StatelessWidget {
+  const CustomMarker({super.key, this.label});
+  final String? label;
+
+  @override
+  Widget build(BuildContext context) {
+    return Icon(
+      Icons.location_on_sharp,
+      color: Theme.of(context).colorScheme.primary,
+      size: 30,
+    );
+  }
+}