Pet project in rust: CLI Task Manager

Now it only implements some basic functionality:

1. Add/remove task
2. Mark task completed
3. List all tasks
4. Saves the tasks on disk using serde to have some persistence
5. Update task (title/description/date)
6. Utilized clap to make the interface more user-friendly
7. Documentation added (comments throughout the code)
8. Some additional features like sorting based on different criteria
9. Added priority to tasks

TODO:

1. Enhance the interface, because it looks ugly right now

Plans after finishing

As it is a pet-project to get the hang of rust, the next logical step would be to extend the project for it to work in web using something like actix