Add Python tip using enumerate() for loops

[loganionian]

The issue proposes a Python tip to use enumerate() for obtaining both the index and the value in loops. This can be demonstrated through a simple example. I will modify chatgpt-test.py to include a new function that uses enumerate() and update the README with this example.

Fixes #50

[almadhlom]

The issue proposes a Python tip to use enumerate() for obtaining both the index and the value in loops. This can be demonstrated through a simple example. I will modify chatgpt-test.py to include a new function that uses enumerate() and update the README with this example.

Fixes #50