 Set up automated Morph/Fix collectors reference

Like #10 and #11, but for Morph/Fix collectors.

Based on [CollectFactory.java](https://github.com/metafacture/metafacture-core/blob/master/metamorph/src/main/java/org/metafacture/metamorph/CollectFactory.java), with a target format like [collectors.md](https://github.com/metafacture/metafacture.github.io/blob/Morph-Documentation-Page/Morph-and-Fix/collectors.md).