📖 docs: integrations/agent_toolkits (#9333)

Note: There are no changes in the file names!

- The group name on the main navbar changed: `Agent toolkits` -> `Agents
& Toolkits`. Examples here are the mix of the Agent and Toolkit examples
because Agents and Toolkits in examples are always used together.
- Titles changed: removed "Agent" and "Toolkit" suffixes. The reason is
the same.
- Formatting: mostly cleaning the header structure, so it could be
better on the right-side navbar.

Main navbar is looking much cleaner now.

docs/extras/integrations/toolkits/sql_database.ipynb

@@ -1,22 +1,21 @@
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    "source": [
-    "# SQL Database Agent\n",
+    "# SQL Database\n",
     "\n",
-    "This notebook showcases an agent designed to interact with a sql databases. The agent builds off of [SQLDatabaseChain](https://python.langchain.com/docs/use_cases/tabular/sqlite) and is designed to answer more general questions about a database, as well as recover from errors.\n",
+    "This notebook showcases an agent designed to interact with a `SQL` databases. \n",
+    "The agent builds off of [SQLDatabaseChain](https://python.langchain.com/docs/use_cases/tabular/sqlite) and is designed to answer more general questions about a database, as well as recover from errors.\n",
     "\n",
     "Note that, as this agent is in active development, all answers might not be correct. Additionally, it is not guaranteed that the agent won't perform DML statements on your database given certain questions. Be careful running it on sensitive data!\n",
     "\n",
-    "This uses the example Chinook database. To set it up follow the instructions on https://database.guide/2-sample-databases-sqlite/, placing the .db file in a notebooks folder at the root of this repository."
+    "This uses the example `Chinook` database. To set it up follow the instructions on https://database.guide/2-sample-databases-sqlite/, placing the .db file in a notebooks folder at the root of this repository."
    ]
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@@ -56,12 +55,11 @@
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    "source": [
-    "## Using ZERO_SHOT_REACT_DESCRIPTION\n",
+    "## Using `ZERO_SHOT_REACT_DESCRIPTION`\n",
     "\n",
     "This shows how to initialize the agent using the ZERO_SHOT_REACT_DESCRIPTION agent type."
    ]
@@ -84,7 +82,6 @@
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@@ -110,7 +107,6 @@
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@@ -136,7 +132,6 @@
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@@ -147,7 +142,6 @@
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@@ -237,7 +231,6 @@
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@@ -312,7 +305,6 @@
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@@ -495,7 +487,6 @@
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@@ -639,7 +630,7 @@
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