update tasks to have a "do date" and add support for adding them to calendar, manually and intelligently

[senyc]

TODO: add new fields do date etc
TODO: create new tasks creation process using new modal etc (for new task in calendar)
TODO: update new event modal (on calendar) to use SelectButton to toggle task/event (like gcal)
TODO: add /calendar endpoint to include tasks and events
TODO: add separate styles for tasks with check box and amount of time it will take (not time)
TODO: add dragging to move tasks/events between days (separate out dragging probably into parent)
TODO: cleanup dragging and clicking process
TODO: fix the grid lines to be more accurate
TODO: add time bar support (like what time it is)
TODO: add cloning
TODO: add recurring support
TODO: handle recurring deletion/one-off-deletion
TODO: add intelligent new tag insertion support