Added interface for WLedClient to make it mockable

Author: dbeuchler

src/Kevsoft.WLED/IWLedClient.cs

@@ -0,0 +1,18 @@
+namespace Kevsoft.WLED;
+
+public interface IWLedClient
+{
+    Task<WLedRootResponse> Get();
+
+    Task<StateResponse> GetState();
+
+    Task<InformationResponse> GetInformation();
+
+    Task<string[]> GetEffects();
+
+    Task<string[]> GetPalettes();
+
+    Task Post(WLedRootRequest request);
+
+    Task Post(StateRequest request);
+}

src/Kevsoft.WLED/WLedClient.cs

@@ -1,6 +1,6 @@
 namespace Kevsoft.WLED;
 
-public sealed class WLedClient
+public sealed class WLedClient : IWLedClient
 {
     private readonly HttpClient _client;