Issue 11 projects as lists

[mwakerman]

#11

[mwakerman]

This is still a work in progress. Plenty of sharp edges (but not as many as I expected).

Main outstanding tasks:

• [ ] default to using Projects "Mode" iff not_premium && no labels otherwise warn when user attempts to add task
• [ ] current tasks/list grouping logic occurs when fetching lists. Probably want to store raw todoist data in state and then group and sort as needed (this is a good idea regardless 😬)
• [ ] adding tasks
• [ ] moving tasks
• [ ] adding lists
• [ ] moving lists
• [ ] sorting? should use project order by default?
• [ ] possibly shouldn't be under "Filters"