update modules sidebar (#13141)

docs/docs/get_started/introduction.mdx

@@ -45,20 +45,14 @@ These docs focus on the Python LangChain library. [Head here](https://js.langcha
 
 ## Modules
 
-LangChain provides standard, extendable interfaces and integrations for the following modules, listed from least to most complex:
+LangChain provides standard, extendable interfaces and integrations for the following modules:
 
 #### [Model I/O](/docs/modules/model_io/)
 Interface with language models
 #### [Retrieval](/docs/modules/data_connection/)
 Interface with application-specific data
-#### [Chains](/docs/modules/chains/)
-Construct sequences of calls
 #### [Agents](/docs/modules/agents/)
 Let chains choose which tools to use given high-level directives
-#### [Memory](/docs/modules/memory/)
-Persist application state between runs of a chain
-#### [Callbacks](/docs/modules/callbacks/)
-Log and stream intermediate steps of any chain
 
 ## Examples, ecosystem, and resources
 ### [Use cases](/docs/use_cases/question_answering/)

docs/docs/modules/index.mdx

@@ -4,16 +4,18 @@ sidebar_class_name: hidden
 
 # Modules
 
-LangChain provides standard, extendable interfaces and external integrations for the following modules, listed from least to most complex:
+LangChain provides standard, extendable interfaces and external integrations for the following main modules:
 
 #### [Model I/O](/docs/modules/model_io/)
 Interface with language models
 #### [Retrieval](/docs/modules/data_connection/)
 Interface with application-specific data
-#### [Chains](/docs/modules/chains/)
-Construct sequences of calls
 #### [Agents](/docs/modules/agents/)
 Let chains choose which tools to use given high-level directives
+
+## Additional
+#### [Chains](/docs/modules/chains/)
+Common, building block compositions
 #### [Memory](/docs/modules/memory/)
 Persist application state between runs of a chain
 #### [Callbacks](/docs/modules/callbacks/)

docs/docs/modules/model_io/models/chat/index.ipynb

@@ -6,7 +6,6 @@
    "metadata": {},
    "source": [
     "---\n",
-    "sidebar_position: 1\n",
     "title: Chat models\n",
     "---"
    ]

docs/docs/modules/model_io/models/index.mdx

@@ -5,10 +5,10 @@ sidebar_position: 1
 
 LangChain provides interfaces and integrations for two types of models:
 
-- [LLMs](/docs/modules/model_io/models/llms/): Models that take a text string as input and return a text string
 - [Chat models](/docs/modules/model_io/models/chat/): Models that are backed by a language model but take a list of Chat Messages as input and return a Chat Message
+- [LLMs](/docs/modules/model_io/models/llms/): Models that take a text string as input and return a text string
 
-## LLMs vs chat models
+## LLMs vs Chat models
 
 LLMs and chat models are subtly but importantly different. LLMs in LangChain refer to pure text completion models.
 The APIs they wrap take a string prompt as input and output a string completion. OpenAI's GPT-3 is implemented as an LLM.

docs/docs/modules/model_io/models/llms/index.ipynb

@@ -6,7 +6,6 @@
    "metadata": {},
    "source": [
     "---\n",
-    "sidebar_position: 0\n",
     "title: LLMs\n",
     "---"
    ]

docs/sidebars.js

@@ -46,8 +46,22 @@ module.exports = {
     {
       type: "category",
       label: "Modules",
-      collapsed: true,
-      items: [{ type: "autogenerated", dirName: "modules" } ],
+      collapsed: false,
+      items: [
+        { type: "category", label: "Model I/O", collapsed: true, items: [{type:"autogenerated", dirName: "modules/model_io" }], link: { type: 'doc', id: "modules/model_io/index"}},
+        { type: "category", label: "Retrieval", collapsed: true, items: [{type:"autogenerated", dirName: "modules/data_connection" }], link: { type: 'doc', id: "modules/data_connection/index"}},
+        { type: "category", label: "Agents", collapsed: true, items: [{type:"autogenerated", dirName: "modules/agents" }], link: { type: 'doc', id: "modules/agents/index"}},
+        {
+          type: "category",
+          label: "More",
+          collapsed: true,
+          items: [
+            { type: "category", label: "Chains", collapsed: true, items: [{type:"autogenerated", dirName: "modules/chains" }], link: { type: 'doc', id: "modules/chains/index"}},
+            { type: "category", label: "Memory", collapsed: true, items: [{type:"autogenerated", dirName: "modules/memory" }], link: { type: 'doc', id: "modules/memory/index"}},
+            { type: "category", label: "Callbacks", collapsed: true, items: [{type:"autogenerated", dirName: "modules/callbacks" }], link: { type: 'doc', id: "modules/callbacks/index"}},
+          ]
+        }
+      ],
       link: {
         type: 'doc',
         id: "modules/index"