Migrate assets and configs

collections/js/function.yaml

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+slug: js/t/function
+name: JavaScript Function Snippets
+miniName: Function
+featured: true
+parent: js
+languageMatcher: javascript
+tagMatcher: function
+description: >-
+  The JavaScript snippet collection contains a wide variety of ES6 helper
+  functions. It includes helpers for dealing with primitives, arrays and
+  objects, as well as algorithms, DOM manipulation functions and Node.js
+  utilities.
+shortDescription: >-
+  Learn everything about JavaScript functions with this ES6 snippet collection.
+splash: tablet.png