[Feature] Add sort functions to standard library

[hdwalters]

Is your feature request related to a problem? Please describe.
The standard library is missing sorting functionality. This needs to be rectified.

Describe the solution you'd like
I suggest adding two functions to the array.ab file:

/// Sort the array in-place.
/// Pass `human` value `true` for human readable sort.
pub fun sort(ref array: [], human: Bool = false): Null {
    array = sorted(array)
}

/// Return the sorted array, leaving the original array unchanged.
/// Pass `human` value `true` for human readable sort.
pub fun sorted(array: [], human: Bool = false): [] {
    ...
}

Describe alternatives you've considered
N/A

Additional context
I suggest using the Bash sort command, with option -V for human readable sort. This reads standard input and writes standard output.