Add property storage capabilities

src/settings-ui/Microsoft.PowerToys.Settings.UI.Library/EspressoProperties.cs

@@ -0,0 +1,33 @@
+using System.Text.Json.Serialization;
+
+namespace Microsoft.PowerToys.Settings.UI.Library
+{
+    public class EspressoProperties
+    {
+        public EspressoProperties()
+        {
+            IsEnabled = new BoolProperty();
+            KeepDisplayOn = new BoolProperty();
+            Mode = EspressoMode.INDEFINITE;
+            TimeAllocation = new IntProperty();
+        }
+
+        [JsonPropertyName("espresso_is_enabled")]
+        public BoolProperty IsEnabled { get; set; }
+
+        [JsonPropertyName("espresso_keep_display_on")]
+        public BoolProperty KeepDisplayOn { get; set; }
+
+        [JsonPropertyName("espresso_mode")]
+        public EspressoMode Mode { get; set; }
+
+        [JsonPropertyName("espresso_time_allocation")]
+        public IntProperty TimeAllocation { get; set; }
+    }
+
+    public enum EspressoMode
+    {
+        INDEFINITE = 0,
+        TIMED = 1,
+    }
+}