Studio: Limit depth on mu-plugins for selecting local tree (#2008)

* Limit depth on mu-plugins

* Add comment

---------

Co-authored-by: Kateryna Kodonenko <[email protected]>

Author: katinthehatsite

src/modules/sync/lib/tree-utils.ts

@@ -27,6 +27,11 @@ export const shouldLimitDepth = ( relativePath: string ): boolean => {
 		return true;
 	}
 
+	// Match mu-plugins/mu-plugin or mu-plugins/mu-plugin/
+	if ( normalizedPath.match( /^mu-plugins\/[^/]+\/?$/ ) ) {
+		return true;
+	}
+
 	return false;
 };