added old code, fixed it (mostly), merged some new code to the old code, made it mostly runnable

Client/Classes/System/Utils/StringUtils.py

@@ -0,0 +1,11 @@
+import random
+import string
+
+
+class StringUtils:
+    def get_random_string(length) -> str:
+        # choose from all lowercase letter
+        letters = string.ascii_lowercase
+        result_str = ''.join(random.choice(letters) for i in range(length))
+        print("Random string of length", length, "is:", result_str)
+        return result_str