feat: Support importing .docx or .html files as new documents (#1551)

* Support importing .docx as new documents

* Add html file support, build types and interface for easily adding file types to importer

* fix: Upload embedded images in docx to storage

* refactor: Bulk of logic to command

* refactor: Do all importing on server, so we're not splitting logic for import into two places

* test: Add documentImporter tests


Co-authored-by: Lance Whatley <whatl3y@gmail.com>

server/commands/userInviter.test.js

@@ -1,7 +1,7 @@
 /* eslint-disable flowtype/require-valid-file-annotation */
-import userInviter from "../commands/userInviter";
 import { buildUser } from "../test/factories";
 import { flushdb } from "../test/support";
+import userInviter from "./userInviter";
 
 beforeEach(() => flushdb());