refactor: Setup node context API, and consolidate code between Webhook and Wait nodes (no-changelog) (#6464)

packages/workflow/src/Interfaces.ts

@@ -1258,6 +1258,16 @@ export interface INodeType {
 	};
 }
 
+/**
+ * This class serves as the base for all nodes using the new context API
+ * having this as a class enables us to identify these instances at runtime
+ */
+export abstract class Node {
+	abstract description: INodeTypeDescription;
+	execute?(context: IExecuteFunctions): Promise<INodeExecutionData[][]>;
+	webhook?(context: IWebhookFunctions): Promise<IWebhookResponseData>;
+}
+
 export interface IVersionedNodeType {
 	nodeVersions: {
 		[key: number]: INodeType;