feat(coding-agent): Add widget placement option (#850)

* Add widget placement for extension widgets

* Remove changelog entry for widget placement

* Keep no-op widget signature

* Move widget render before attach

packages/coding-agent/src/core/extensions/index.ts

@@ -58,6 +58,7 @@ export type {
 	ExtensionShortcut,
 	ExtensionUIContext,
 	ExtensionUIDialogOptions,
+	ExtensionWidgetOptions,
 	FindToolResultEvent,
 	GetActiveToolsHandler,
 	GetAllToolsHandler,
@@ -116,6 +117,7 @@ export type {
 	// Events - User Bash
 	UserBashEvent,
 	UserBashEventResult,
+	WidgetPlacement,
 	WriteToolResultEvent,
 } from "./types.js";
 // Type guards