Added drag-and-drop recipe to links and ToC 📝

Author: triplingual

_includes/links.md

@@ -84,6 +84,7 @@
 
 [0560]: {{ site.cookbook_url | absolute_url }}/recipe/0560-resources-on-a-timeline/ "Rendering Resources Sequentially on a Timeline"
 [0561]: {{ site.cookbook_url | absolute_url }}/recipe/0561-text-on-image/ "Visible Text Resource on a Canvas"
+[0599]: {{ site.cookbook_url | absolute_url }}/recipe/0599-drag-and-drop/ "Drag and Drop"
 
 [cookbook-process]: {{site.cookbook_url | absolute_url }}/recipe
 

index.md

@@ -148,7 +148,7 @@ Recipes using [Content State API](https://iiif.io/api/content-state/1.0/)
 * [Loading a manifest with a viewer using a link][0466]
 * [Open a specific region of a canvas in a viewer][0485]
 * [Sharing a link for opening two or more Canvases][0540]
-
+* [Drag and drop][0599]
 
 
 ## Technical