feature: workspace support (#445)

src/ViewModels/Workspace.cs

@@ -0,0 +1,58 @@
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+using Avalonia.Media;
+
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace SourceGit.ViewModels
+{
+    public class Workspace : ObservableObject
+    {
+        public string Name
+        {
+            get => _name;
+            set => SetProperty(ref _name, value);
+        }
+
+        public uint Color
+        {
+            get => _color;
+            set
+            {
+                if (SetProperty(ref _color, value))
+                    Brush = new SolidColorBrush(value);
+            }
+        }
+
+        public List<string> Repositories
+        {
+            get;
+            set;
+        } = new List<string>();
+
+        public bool IsActive
+        {
+            get => _isActive;
+            set => SetProperty(ref _isActive, value);
+        }
+
+        [JsonIgnore]
+        public IBrush Brush
+        {
+            get => _brush;
+            private set => SetProperty(ref _brush, value);
+        }
+
+        public void AddRepository(string repo)
+        {
+            if (!Repositories.Contains(repo))
+                Repositories.Add(repo);
+        }
+
+        private string _name = string.Empty;
+        private uint _color = 0;
+        private IBrush _brush = null;
+        private bool _isActive = false;
+    }
+}