Initial commit: FieldLogger MAUI app with Maglink BLE support

Added Maglink RTK GNSS receiver integration with correct BLE UUIDs and device name filtering (ML-* prefix).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

FieldLogger/Views/SettingsPage.xaml.cs

@@ -0,0 +1,12 @@
+using FieldLogger.ViewModels;
+
+namespace FieldLogger.Views;
+
+public partial class SettingsPage : ContentPage
+{
+    public SettingsPage(SettingsViewModel viewModel)
+    {
+        InitializeComponent();
+        BindingContext = viewModel;
+    }
+}