Add override keyword in codebase (#120755)

For #120675

This uses a script to add the override keyword to places that need it in the codebase

Note that we can't enable the --noImplicitOverride setting yet since there are still around 200 errors that require further attention

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

@@ -60,7 +60,7 @@ class ExtHostWebviewPanel extends Disposable implements vscode.WebviewPanel {
 		this.#webview = webview;
 	}
 
-	public dispose() {
+	public override dispose() {
 		if (this.#isDisposed) {
 			return;
 		}