Fixed and dynamic typed arrays

// Both typed array families are built in; no import is required.
let fixed = Array<Int64>(size: 4, fill: 0)
fixed.set(0, 30)
fixed.set(1, 10)
fixed.set(2, 20)
print(fixed.to_list())
fixed.sort()
print(fixed.to_list())
print(fixed.find(20))

let values = DynamicArray<Int64>(capacity: 2)
values.append(30)
values.append(10)
values.append(20) // Capacity doubles from 2 to 4.
print(values.len())
print(values.capacity())
print(values.is_sorted())
print(values.find(20))
values.sort()
print(values.is_sorted())
print(values.find(20))
values.set(0, 99) // Sorted metadata is maintained after every mutation.
print(values.is_sorted())
print(values.find(20))
let independent = values.copy()
values.set(0, 5)
print(independent.to_list())
let words = DynamicArray<String>(capacity: 2)
words.append("pear")
words.append("apple")
words.sort()
print(words.to_list())