Add Concern Configuration interface

packages/contracts/src/support/concerns/Configuration.ts

@@ -0,0 +1,23 @@
+import Concern from "./Concern";
+import type {
+    Aliases 
+} from "./types";
+
+/**
+ * Concern Configuration
+ * 
+ * Defines the target Concern that must be injected into a target class,
+ * along with what aliases to be created. 
+ */
+export default interface Configuration<T extends Concern>
+{
+    /**
+     * The target Concern Class this configuration is for
+     */
+    concern: T;
+
+    /**
+     * Aliases for Concern's properties or methods.
+     */
+    aliases?: Aliases<T>
+}