Family Day update

Task/Sorting-algorithms-Permutation-sort/Crystal/sorting-algorithms-permutation-sort.crystal

@@ -0,0 +1,18 @@
+def sorted?(items : Array)
+    prev = items[0]
+    items.each do |item|
+        if item < prev
+            return false
+        end
+        prev = item
+    end
+    return true
+end
+
+def permutation_sort(items : Array)
+    items.each_permutation do |permutation|
+        if sorted?(permutation)
+            return permutation
+        end
+    end
+end