Added Giphy support, Favourites

src/EbbesMemeClipboard/Services/IGifProvider.cs

@@ -0,0 +1,17 @@
+using EbbesMemeClipboard.Models;
+
+namespace EbbesMemeClipboard.Services;
+
+public interface IGifProvider
+{
+    MemeSource Source { get; }
+
+    /// <summary>False when the provider isn't usable yet (e.g. no API key configured).</summary>
+    bool IsConfigured { get; }
+
+    /// <summary>Shown in the UI when IsConfigured is false, explaining how to fix it.</summary>
+    string NotConfiguredMessage { get; }
+
+    /// <summary>An empty query returns whatever the provider considers trending.</summary>
+    Task<IReadOnlyList<GifSearchResult>> SearchAsync(string query, int limit, CancellationToken ct);
+}