[Feature Request] Add support for Google Docs

[CarlSinclair]

I exported all my Google Drive data using Takeout and sure, there was a lot of unwanted files, but I cleaned up the archive and fed it to the importer. It skipped all docx, json, xlsx, and pptx files.

While it makes sense that presentations and even spreadsheets wouldn't be supported, I see no reason why docx and even json wouldn't be.