docs: added entity reference (#2047)

* added entity reference

* chore: added github action

* added link to reference

www/docs/docusaurus.config.js

@@ -96,6 +96,11 @@ module.exports = {
               to: "cli/reference",
               label: "CLI Reference",
             },
+            {
+              type: "docSidebar",
+              sidebarId: "entitiesSidebar",
+              label: "Entities Reference",
+            },
             {
               to: "advanced/backend/subscribers/events-list",
               label: "Events Reference",