`sort` bulit-in function

[raviqqe]

Problem

• There is no quick way to sort generic lists.

Solution

• Add a sort built-in function.
• It type is \([T], \(T, T) boolean | none.
  • The result values mean:
    • none: equal
    • false: less than
    • true: greater than
  • Or just boolean for "less than" and "greater than or equal?"