docs: added architecture documentation (#9256)

* docs: added architecture documentation

* update diagrams and text

* address PR comments

* sidebar + overview fixes

www/apps/book/next.config.mjs

@@ -139,6 +139,11 @@ const nextConfig = {
         destination: "/more-resources/cheatsheet",
         permanent: true,
       },
+      {
+        source: "/architectural-modules",
+        destination: "/advanced-development/architecture/architectural-modules",
+        permanent: true,
+      },
     ]
   },
 }