🥥 v0.2.2 ZIP import/export and undo/redo + published on JS.ORG

Now we have a beautiful address: https://hashfs.js.org/

And we can export all files in the vault (storing mime types in a .hashfs_meta.json file) and then import them back into another account/instance/browser/device. Also now we're utilizing our hash chains to drive very stable and reliable undo/redo functionality. All necessary CRUD operations are achieved!