Add Data Fetching Guide (#991)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>
Co-authored-by: Sarah <gerrardsarah@gmail.com>

Author: 3 people

src/routes/solid-start/data.json

@@ -4,6 +4,7 @@
 		"index.mdx",
 		"getting-started.mdx",
 		"building-your-application",
-		"advanced"
+		"advanced",
+		"guides"
 	]
 }