Store uploaded files in IDB

[davidmyersdev]

• Add a new files table
• On upload, store files in the files table
• Create URLs for these files
• Insert URLs into the current doc
• Add a page to view/manage files

[3thanHead]

@davidmyersdev this seems like a good one to get started. Mind if I grab?

[davidmyersdev]

Hey @3thanHead! I just saw your comment here. I'm currently working on migrating the main client-side database over to dexie (currently using localforage). You might run into some conflicts if you pick this one up. I'm totally fine with that if you are, but I don't want to cause you a lot of extra rework.