Add a doc on Horizon Endpoints on Lab

docs/data/horizon/api-reference/structure/README.mdx

@@ -5,4 +5,8 @@ sidebar_label: Structure
 description: Horizon is an API for interacting with the Stellar network.
 ---
 
+import DocCardList from "@theme/DocCardList";
+
 How Horizon is structured.
+
+<DocCardList />

docs/tools/developer-tools/lab/account.mdx

@@ -1,3 +1,9 @@
+---
+title: Account
+description: Explore Stellar Lab's Account Page by creating and funding account on Stellar
+sidebar_position: 10
+---
+
 # Account
 
 ## [Create Account Keypair](https://lab.stellar.org/account/create)

docs/tools/developer-tools/lab/api-explorer/README.mdx

@@ -0,0 +1,14 @@
+---
+title: API Explorer
+sidebar_position: 20
+---
+
+import DocCardList from "@theme/DocCardList";
+
+# Developer Tools
+
+This section demonstrates how to use RPC methods and Horizon endpoints on the Stellar Lab across different networks, including features like sharing URLs and saving requests for future use.
+
+You can explore the various endpoints from the RPC and Horizon, make requests to these endpoints, and save them for future use.
+
+<DocCardList />