Initial data commit

Task/Sorting-algorithms-Quicksort/11l/sorting-algorithms-quicksort.11l

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+F _quicksort(&array, start, stop) -> N
+   I stop - start > 0
+      V pivot = array[start]
+      V left = start
+      V right = stop
+      L left <= right
+         L array[left] < pivot
+            left++
+         L array[right] > pivot
+            right--
+         I left <= right
+            swap(&array[left], &array[right])
+            left++
+            right--
+      _quicksort(&array, start, right)
+      _quicksort(&array, left, stop)
+
+F quicksort(&array)
+   _quicksort(&array, 0, array.len - 1)
+
+V arr = [7, 6, 5, 9, 8, 4, 3, 1, 2, 0]
+quicksort(&arr)
+print(arr)