feat: complete UM Trace iOS and field UI integration

FieldLogger/Views/Controls/FloatingMenuButton.xaml.cs

@@ -0,0 +1,15 @@
+namespace FieldLogger.Views.Controls;
+
+public partial class FloatingMenuButton : ContentView
+{
+    public FloatingMenuButton()
+    {
+        InitializeComponent();
+    }
+
+    private void OnMenuClicked(object? sender, EventArgs e)
+    {
+        if (Shell.Current is not null)
+            Shell.Current.FlyoutIsPresented = true;
+    }
+}