add theme override customizations

LightlessSync/LightlessConfiguration/Configurations/UiStyleOverride.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Numerics;
+
+namespace LightlessSync.LightlessConfiguration.Configurations;
+
+[Serializable]
+public class UiStyleOverride
+{
+    public uint? Color { get; set; }
+    public float? Float { get; set; }
+    public Vector2Config? Vector2 { get; set; }
+
+    public bool IsEmpty => Color is null && Float is null && Vector2 is null;
+}
+
+[Serializable]
+public record struct Vector2Config(float X, float Y)
+{
+    public static implicit operator Vector2(Vector2Config value) => new(value.X, value.Y);
+    public static implicit operator Vector2Config(Vector2 value) => new(value.X, value.Y);
+}

LightlessSync/LightlessConfiguration/Configurations/UiThemeConfig.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+
+namespace LightlessSync.LightlessConfiguration.Configurations;
+
+[Serializable]
+public class UiThemeConfig : ILightlessConfiguration
+{
+    public Dictionary<string, UiStyleOverride> StyleOverrides { get; set; } = new(StringComparer.OrdinalIgnoreCase);
+
+    public int Version { get; set; } = 1;
+}

LightlessSync/LightlessConfiguration/UiThemeConfigService.cs

@@ -0,0 +1,14 @@
+using LightlessSync.LightlessConfiguration.Configurations;
+
+namespace LightlessSync.LightlessConfiguration;
+
+public class UiThemeConfigService : ConfigurationServiceBase<UiThemeConfig>
+{
+    public const string ConfigName = "ui-theme.json";
+
+    public UiThemeConfigService(string configDir) : base(configDir)
+    {
+    }
+
+    public override string ConfigurationName => ConfigName;
+}