Add project files.

src/framework/Elsa.Studio.Core/Contracts/IFeature.cs

@@ -0,0 +1,13 @@
+namespace Elsa.Studio.Contracts;
+
+/// <summary>
+/// Represents a feature that can be registered with the dashboard.
+/// </summary>
+public interface IFeature
+{
+    /// <summary>
+    /// Called by the dashboard to initialize the feature.
+    /// </summary>
+    /// <param name="cancellationToken">A cancellation token.</param>
+    ValueTask InitializeAsync(CancellationToken cancellationToken = default);
+}