first ui elements using the new structs

frontend/lib/structs/landmark.dart

@@ -0,0 +1,56 @@
+class Landmark {
+  final String name;
+  final List location;
+  final LandmarkType type;
+  // final String description;
+  // final Duration duration;
+  // final bool visited;
+
+  const Landmark({
+    required this.name,
+    required this.location,
+    required this.type,
+    // required this.description,
+    // required this.duration,
+    // required this.visited,
+  });
+
+  factory Landmark.fromJson(Map<String, dynamic> json) {
+    return switch (json) {
+      {
+        'loc': List location,
+        'name': String name,
+        'type': String type,
+        // 'description': String description,
+        // 'duration': int duration,
+        // 'visited': bool visited
+
+      } =>
+        Landmark(
+          name: name,
+          location: location,
+          type: LandmarkType(name: type)
+          // description: description,
+          // duration: Duration(minutes: duration),
+          // visited: visited
+        ),
+      _ => throw const FormatException('Failed to load destination.'),
+    };
+  }
+
+}
+
+
+class LandmarkType {
+  final String name;
+  // final String description;
+  // final Icon icon;
+  
+  const LandmarkType({
+    required this.name,
+    // required this.description,
+    // required this.icon,
+  });
+}
+
+