feat(docs-infra): created new widget for events page (#36517)

Data in events page was hardcoded and it is manually moved in the table.

Created a new events widget which will automatically move past and upcoming
events from events.json (`aio/content/marketing/events.json`) file to the
relevant table in the events tab

PR Close #36517

aio/tools/transforms/angular-base-package/processors/createSitemap.js

@@ -5,6 +5,7 @@ module.exports = function createSitemap() {
       'contributors-json',
       'navigation-json',
       'resources-json',
+      'events-json'
     ],
     ignoredPaths: [
       'file-not-found',