Add microfiber SDL manipulation library to the Code page's list of javascript tools

src/content/code/language-support/javascript/tools/microfiber.md

@@ -0,0 +1,33 @@
+---
+name: Microfiber
+description: A library to query and manipulate GraphQL Introspection Query results.
+url: https://github.com/anvilco/graphql-introspection-tools
+github: anvilco/graphql-introspection-tools
+npm: "microfiber"
+---
+
+Microfiber is a JavaScript library that allows:
+
+* Digging through your Introspection Query Results for a specific Query, Mutation, Type, Field, Argument or Subscription.
+* Removing a specific Query, Mutation, Type, Field/InputField, Argument or Subscription from your Introspection Query Results.
+* Removing Queries, Mutations, Fields/InputFields or Arguments that refer to Type that does not exist in - or has been removed from - your Introspection Query Results.
+
+```sh
+npm install microfiber
+# OR
+yarn add microfiber
+```
+
+Then in JS:
+
+```js
+import { Microfiber } from 'microfiber'
+
+const introspectionQueryResults = {...}
+
+const microfiber = new Microfiber(introspectionQueryResults)
+
+// ...do some things to your schema with `microfiber`
+
+const cleanedIntrospectonQueryResults = microfiber.getResponse()
+```