Add option to not pass --no-ignore-parent to rg

src/vscode-dts/vscode.proposed.findTextInFiles.d.ts

@@ -47,6 +47,12 @@ declare module 'vscode' {
 		 */
 		useGlobalIgnoreFiles?: boolean;
 
+		/**
+		 * Whether files in parent directories that exclude files, like .gitignore, should be respected.
+		 * See the vscode setting `"search.useParentIgnoreFiles"`.
+		 */
+		useParentIgnoreFiles?: boolean;
+
 		/**
 		 * Whether symlinks should be followed while searching.
 		 * See the vscode setting `"search.followSymlinks"`.