feat(alias): support DomainObject.alias declaration (#37)

src/instantiation/DomainObject.ts

@@ -28,6 +28,17 @@ export class DomainObject<T extends Record<string, any>> {
     Object.assign(this, hydratedProps);
   }
 
+  /**
+   * DomainObject.alias
+   *
+   * When set, declares the alias via which domain objects of this class are known to be referred to.
+   *
+   * Relevance
+   * - formalizes that we can expect to see the dobj referred to by this alias
+   * - enables code generators to use this colloquial alias in contracts for better devex
+   */
+  public static alias?: string;
+
   /**
    * DomainObject.schema
    *