[Tutorial] Turn Loops and Recursion into Recursion only

[cuihtlauac]

• [ ] Move imperative & mutability related content to dedicated content
• [ ] Make it a recursion centered tutorial
• [ ] Properly introduce mutually recursive types and functions
• [ ] Tail recursion and tail recursion modulo
• [ ] Higher-Order iterators: map, fold, unfold, bind, app
• [ ] Non structural recursion (Ackermann or Syracuse)
• [ ] Infinite loops as recursion w/o memory leaks
• [ ] Recursion on sequences
• [ ] Standalone, short and executable examples

[Dev-JoyA]

@SaySayo i would love to work on this task

[SaySayo]

You can go ahead. Let me know if you need any clarification.