feat: add insertionSort in python (doocs#808)

Author: CGgeeker

basic/sorting/InsertionSort/InsertionSort.py

@@ -0,0 +1,10 @@
+def insertion_sort(array):
+    for i in range(len(array)):
+        cur_index = i
+        while array[cur_index - 1] > array[cur_index] and cur_index - 1 >= 0:
+            array[cur_index], array[cur_index - 1] = array[cur_index - 1], array[cur_index]
+            cur_index -= 1
+    return array
+
+array = [10, 17, 50, 7, 30, 24, 27, 45, 15, 5, 36, 21]
+print(insertion_sort(array))