Add can bridge

[pkess]

Hello,

it might be useful to have the possibility to use the RedirectReader in a script so that one can connect two can busses with a single cli program. This is extremly helpful if one would like to connect e.g. socketcand with a proprietary hardware interface.

Comments are appreciated

[zariiii9003]

I think this is may be very useful 👍

Not a review yet, but a few notes:

• New code should have type annotations, at least for the function signatures.
• The other CLI tools have tests in test_scripts.py and e.g. test_player.py, test_logger.py etc., i think this bridge could also be tested with two virtual buses.
• Minor: I think the plural of bus is usually buses, not busses 🤷‍♂️

[pkess]

Ok. I will work on all those three

[pkess]

I addes some very basic tests now. I do not know at the moment how to test that a message that was received on one bus is forwarded to the other bus. Maybe i can try this again in the next days