Changes
- New feature: language statistics 🎉
- Lets you see your top languages, and a total count of each language used on your account
- Fixed a bug where you were not able to return to main menu or exit to shell from inside *SSH keys management* 🐛
- Refactored a lot of code to make it simpler and clearer
- Integrated [black](https://github.com/psf/black) code formatting