move SheepIt settings to global settings

ViewModels/GlobalSettingsViewModel.cs

@@ -0,0 +1,45 @@
+using UnifiedFarmLauncher.Models;
+using UnifiedFarmLauncher.Services;
+
+namespace UnifiedFarmLauncher.ViewModels
+{
+    public class GlobalSettingsViewModel : ViewModelBase
+    {
+        private readonly ConfigService _configService;
+        private string _sheepItUsername = string.Empty;
+        private string _sheepItRenderKey = string.Empty;
+
+        public GlobalSettingsViewModel(ConfigService configService)
+        {
+            _configService = configService;
+            LoadSettings();
+        }
+
+        public string SheepItUsername
+        {
+            get => _sheepItUsername;
+            set => SetAndRaise(ref _sheepItUsername, value);
+        }
+
+        public string SheepItRenderKey
+        {
+            get => _sheepItRenderKey;
+            set => SetAndRaise(ref _sheepItRenderKey, value);
+        }
+
+        private void LoadSettings()
+        {
+            var config = _configService.Load();
+            SheepItUsername = config.GlobalSettings.SheepItUsername;
+            SheepItRenderKey = config.GlobalSettings.SheepItRenderKey;
+        }
+
+        public void Save()
+        {
+            var config = _configService.Load();
+            config.GlobalSettings.SheepItUsername = SheepItUsername;
+            config.GlobalSettings.SheepItRenderKey = SheepItRenderKey;
+            _configService.Save(config);
+        }
+    }
+}