Add a "Guides" section to the API landing page template (#40427)

* Add a "Guides" section to the API landing page template

* Update index.md

* Update files/en-us/mdn/writing_guidelines/page_structures/page_types/api_landing_page_template/index.md

Author: Josh-Cena

files/en-us/mdn/writing_guidelines/page_structures/page_types/api_landing_page_template/index.md

@@ -107,7 +107,14 @@ Don't go into a lot of detail in this section, and don't include code examples.
 If there are a lot of concepts to explain around this API, you should explain them in a separate "Fundamentals" or "Concepts" article (e.g., [Fundamentals of WebXR](/en-US/docs/Web/API/WebXR_Device_API/Fundamentals)).
 For a practical usage guide with code examples, you should include a "Usage…" article in your API docs (e.g., [Using the WebVR API](/en-US/docs/Web/API/WebVR_API/Using_the_WebVR_API)).
 
-To help improve content discoverability and {{Glossary("SEO")}}, keep the following tips in mind:
+## Guides
+
+Include a list of guide pages under this landing page. Each DT should link to the guide page. This section is optional; if there's only a single "Using" guide, along with a few other conceptual guides, you may find it more convenient to link to them as a paragraph at the end of the "Concepts and usage" section instead. This section may be more helpful if there are so many guides that prose becomes hard to scan.
+
+- Using the ... API
+  - : Intro paragraph of this guide page
+- Guide 2
+  - : Intro paragraph of this guide page
 
 ## Interfaces