docs: improved qovery documentation (#1875)

* improved qovery guide

* added cli reference link

www/docs/docusaurus.config.js

@@ -72,6 +72,10 @@ module.exports = {
               target: "_self",
               label: "API Reference",
             },
+            {
+              to: "cli/reference",
+              label: "CLI Reference",
+            },
             {
               to: "advanced/backend/subscribers/events-list",
               label: "Events Reference",