Add frontmatter menu icons

src/_data/sidenav/api.yml

@@ -11,7 +11,8 @@ sections:
       title: API Design
     - path: "/api/config-api/authentication"
       title: Authentication
-    - path: "/api/config-api/reference"
+    - path: "https://reference.segmentapis.com/"
       title: Reference
+      menu_icon: "new-tab"
     - path: "/api/config-api/tutorial-javascript-google-analytics"
       title: Creating a Javascript web source and Google Analytics destination

src/connections/destinations/catalog/index.md

@@ -2,6 +2,7 @@
 title: Destination catalog
 hide_toc: true
 layout: catalog
+menu_icon: "read-more"
 ---
 
 <div class="destinations-catalog">

src/connections/sources/catalog/index.md

@@ -5,6 +5,7 @@ landing: true
 icon: symbols/connections.svg
 excerpt: Detailed information about each destination. Learn how our API methods are implemented for that destination.
 layout: catalog
+menu_icon: "read-more"
 ---
 
 <div class="destinations-catalog">

src/connections/warehouses/catalog/index.md

@@ -1,6 +1,7 @@
 ---
 title: Warehouses catalog
 hide_toc: true
+menu_icon: "read-more"
 ---
 
 <div class="destinations-catalog">