Set up vscode integration test

src/exports/cline.d.ts

@@ -34,4 +34,9 @@ export interface ClineAPI {
 	 * Simulates pressing the secondary button in the chat interface.
 	 */
 	pressSecondaryButton(): Promise<void>
+
+	/**
+	 * The sidebar provider instance.
+	 */
+	sidebarProvider: ClineSidebarProvider
 }

src/exports/index.ts

@@ -56,6 +56,8 @@ export function createClineAPI(outputChannel: vscode.OutputChannel, sidebarProvi
 				invoke: "secondaryButtonClick",
 			})
 		},
+
+		sidebarProvider: sidebarProvider,
 	}
 
 	return api