feat(hello_python): add new exercise subject for scripting piscine

sh/tests/hello_python_test.py

@@ -1,8 +0,0 @@
-import sys
-
-sys.path.append('/jail/app/student')
-
-from hello_python import say_hello_python
-
-def test_say_hello_python():
-    assert say_hello_python() == "Hello Python!"

sh/tests/solutions/hello_python.py

@@ -1,2 +0,0 @@
-def say_hello_python():
-    return "Hello Python!"

subjects/devops/hello_python/README.md

@@ -50,10 +50,10 @@ $
 - Python uses indentation to indicate in which block your code will run (many other languages uses parenthesis instead). It is then very important to indent your code properly.
 
 - `return` is a special world used to say which value a function should return (a function could also not return anything).
-For example `return 10` will return the number ten.
+  For example `return 10` will return the number ten.
 
 - A string is a set of characters wrapped by `"`.
-For example `"Ciao bella"` is a string containing the worlds `Ciao Bella`.
+  For example `"Ciao bella"` is a string containing the worlds `Ciao Bella`.
 
 - In `test.py` we are calling another function named `print`. This function is already present in Python standard library so we don't have to create it. This function at its core is made to write strings in the standard output.