"while"'s "break" could return value

[funny-falcon]

There is solution to "a break in a while loop cannot return a value" inspired by Python:

• Python's while (and for) loop can have else: branch that is executed if loop exited with condition and not with break: https://docs.python.org/3.10/reference/compound_stmts.html#the-while-statement
  This construction is unusual, rare language has else for loops (I don't remember one except Python). Therefore almost nobody uses it.
• But it could naturally complement "break may return value from loop" feature (which Python has not). It could sound like:
  "if while's loop body has break with value, then it has to have else block which results with value of same type".

[baszalmstra]

Thats an interesting idea! Would you be able to create a PR?