Better unexpected error traceback

[RealA10N]

Currently, the traceback for unexpected errors lacks information and in my option, the default python one is better.
I would like to print out the default traceback (or something that is very similar to it) with an additional bold line that states that an unexpected error has occurred.

This solution is great for Python developers and users that aren't familiar with Python:

• Python developers that are using cptk will be familiar with the default Python traceback and will be able to figure out what is the problem if they want to.
• Other users will see the bold statement which states that an unexpected error has occurred, and then they will be able to report the issue if they want to.

The error message should also print some information about the current Python version, and information about the version of cptk.