Add pinned post in ideas

[elis.byberi]

This is the current pinned post, for your reference in case it is unpinned:

About the Ideas category

Would you like to change something in Python? This might be your feedback forum. Use this Category if you want feedback on an idea that you’d like to see in a future version of Python. First, check the following: is there a PEP with what you’re trying to do? is there a topic about this here already? is there a topic on the old python-ideas mailing list about this already?