[feature] Todolist syncable with Git

[HLFH]

It would be cool to have a simple todolist (for ex. : TaskWarrior, HabitRPG, NitroTasks, Todo.txt, Trello, etc.) inside Codebox. Like the projects, the todolist could sync with Git and then accelerate the Agile development.

[SamyPesse]

I think it should be done in an addon, not in the codebox core. I mark this issue as an addon idea.