Enable returns from execute

Author: gjmooney

packages/extension/src/index.ts

@@ -45,7 +45,7 @@ const plugin: JupyterFrontEndPlugin<void> = {
 
     const api: ICommandBridgeRemote = {
       async execute(command: string, args: ReadonlyPartialJSONObject) {
-        await commands.execute(command, args);
+        return await commands.execute(command, args);
       },
       async listCommands() {
         return commands.listCommands();

packages/extension/src/interface.ts

@@ -12,7 +12,7 @@ export interface ICommandBridgeRemote {
    * @param command - The name of the command to execute.
    * @param args - An object containing arguments for the command.
    */
-  execute(command: string, args: ReadonlyPartialJSONObject): void;
+  execute(command: string, args: ReadonlyPartialJSONObject): Promise<any>;
 
   /**
    * Lists all available commands.