consolidate workflow/agent guides

Author: lnhsingh

src/docs.json

@@ -116,31 +116,23 @@
                   "oss/overview",
                   "oss/quickstart",
                   "oss/run-an-agent",
-                  "oss/template-applications"
+                  "oss/prebuilt-vs-low-level"
                 ]
               },
               {
-                "group": "General concepts",
+                "group": "Common architectures",
                 "pages": [
-                  "oss/workflows-and-agents",
-                  "oss/prebuilt-vs-low-level",
-                  {
-                    "group": "Common agent architectures",
-                    "pages": [
-                      "oss/agentic-architectures",
-                      "oss/agentic-rag",
-                      "oss/agent-supervisor",
-                      "oss/sql-agent"
-                    ]
-                  }
+                  "oss/agentic-architectures",
+                  "oss/agentic-rag",
+                  "oss/agent-supervisor",
+                  "oss/sql-agent"
                 ]
               },
               {
                 "group": "Additional resources",
                 "pages": [
                   "oss/case-studies",
-                  "oss/faq",
-                  "oss/langgraph-academy"
+                  "oss/template-applications"
                 ]
               }
             ]