Docs: quick fixes for HTML (#36395)

* Using the new helper in the doc

* Remove input from `Tab` access

* Change scrollspy code examples

* Reordering tables for JS

* Fix for parcel file

* Center align all the code example texts in layout

* Alphabetical reorder the helpers

site/content/docs/5.2/getting-started/parcel.md

@@ -22,13 +22,13 @@ When all will be completed, your project will be structured like this:
 project-name/
 ├── build/
 ├── node_modules/
+│   ├── @popperjs/
+|   |   └── core/
 │   └── bootstrap/
-│   └── @popperjs/
-|       └── core/
 ├── scss/
 │   └── custom.scss
 ├── src/
-│   └── index.html
+│   ├── index.html
 │   └── index.js
 └── package.json
 ```