Add Coddy Python playground (#13453)

* Add Coddy Python playground

* Fix alphabetical ordering of Coddy playground

more/free-programming-playgrounds.md

@@ -330,6 +330,7 @@
 * [Codepad](http://codepad.org/?lang=Python)
 * [InterviewBit - Online Python Compiler IDE](https://www.interviewbit.com/online-python-compiler/)
 * [Online Python](https://www.online-python.com)
+* [Online Python Compiler](https://coddy.tech/playground/python) - Coddy
 * [Online Python Compiler](https://www.programiz.com/python-programming/online-compiler/) - Programiz
 * [Online Python Compiler](https://www.tutorialspoint.com/online_python_compiler.php) - Tutorialspoint
 * [OnlineGDB](https://www.onlinegdb.com/online_python_compiler)