Import type from xterm/headless

Fixes microsoft#248589

Author: Tyriar

src/vs/platform/terminal/common/capabilities/capabilities.ts

@@ -4,41 +4,11 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { Event } from '../../../../base/common/event.js';
-import { IDisposable } from '../../../../base/common/lifecycle.js';
 import type { IPromptInputModel, ISerializedPromptInputModel } from './commandDetection/promptInputModel.js';
 import { ICurrentPartialCommand } from './commandDetection/terminalCommand.js';
 import { ITerminalOutputMatch, ITerminalOutputMatcher } from '../terminal.js';
 import { ReplayEntry } from '../terminalProcess.js';
-
-interface IEvent<T, U = void> {
-	(listener: (arg1: T, arg2: U) => any): IDisposable;
-}
-
-export interface IMarker extends IDisposable {
-	/**
-	 * A unique identifier for this marker.
-	 */
-	readonly id: number;
-
-	/**
-	 * Whether this marker is disposed.
-	 */
-	readonly isDisposed: boolean;
-
-	/**
-	 * The actual line index in the buffer at this point in time. This is set to
-	 * -1 if the marker has been disposed.
-	 */
-	readonly line: number;
-
-	/**
-	 * Event listener to get notified when the marker gets disposed. Automatic disposal
-	 * might happen for a marker, that got invalidated by scrolling out or removal of
-	 * a line from the buffer.
-	 */
-	onDispose: IEvent<void>;
-}
-
+import type { IMarker } from '@xterm/headless';
 
 /**
  * Primarily driven by the shell integration feature, a terminal capability is the mechanism for