JS refactors (#22227)

- Replace all default exports with named exports, except for Vue SFCs
- Remove names from Vue SFCs, they are automatically inferred from the
filename
- Misc whitespace-related tweaks

web_src/js/features/repo-findfile.js

@@ -1,6 +1,6 @@
 import $ from 'jquery';
-
 import {svg} from '../svg.js';
+
 const {csrf} = window.config;
 
 const threshold = 50;