feat: kata vigenere cipher test: test for kata vigenere cipher

src/codewars/kata_cipher_helper.py

@@ -0,0 +1,9 @@
+class VigenereCipher(object):
+    def __init__(self, key, alphabet):
+        pass
+
+    def encode(self, text):
+        pass
+
+    def decode(self, text):
+        pass

tests/codewars/test_cipher_helper.py

@@ -0,0 +1,5 @@
+"""from src.codewars.kata_cipher_helper import *
+
+
+def test_cipher_helper():
+    pass"""