Release v5.3.0-alpha1 (#37661)

* Bump version to 5.3.0-alpha1

* Dist

* Add docs versions updates

* Update note in homepage hero

Co-authored-by: Mark Otto <markdotto@gmail.com>

site/content/docs/5.3/examples/offcanvas-navbar/offcanvas-navbar.js

@@ -0,0 +1,7 @@
+(() => {
+  'use strict'
+
+  document.querySelector('#navbarSideCollapse').addEventListener('click', () => {
+    document.querySelector('.offcanvas-collapse').classList.toggle('open')
+  })
+})()