Attempt to use Google Drive directly

Currently there's no storage solution if someone wants to hack on cone in the web version. If there's a way for cone to use Google Drive directly, this might help initial steps in porting cone to various platforms, like web, ios, etc. Currently, we would just be writing platform specific code to set up storage solutions on a given platform.

In particular, if we have a storage solution in place for web, this would potentially make development of cone accessible to anyone, no matter which platform they are coding from. Implementation of cone on existing platforms would benefit.

Why not another storage solution for web app? My impression is, we'll find more documentation, prewritten software, and examples, for Flutter storage via Google Drive, as opposed to Dropbox, etc.

I'm open to people insisting that we should have file storage via some sort of localhost server, argued for here, or in a new issue, that's fine.

The issue names no files, tests, or entry points. Start by reviewing how storage is currently handled across platforms and the available Google Drive options for Dart and Flutter; done means an agreed storage approach for the web version that can also inform iOS and other platform implementations.

Written by the indexing model from the issue text.