Implement notebook cell status bar

src/vs/workbench/api/common/extHost.api.impl.ts

@@ -1038,6 +1038,7 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 			TimelineItem: extHostTypes.TimelineItem,
 			CellKind: extHostTypes.CellKind,
 			CellOutputKind: extHostTypes.CellOutputKind,
+			NotebookCellRunState: extHostTypes.NotebookCellRunState
 		};
 	};
 }

src/vs/workbench/api/common/extHostTypes.ts

@@ -2713,6 +2713,13 @@ export enum CellOutputKind {
 	Rich = 3
 }
 
+export enum NotebookCellRunState {
+	Running = 1,
+	Idle = 2,
+	Success = 3,
+	Error = 4
+}
+
 //#endregion
 
 //#region Timeline