adding some code for stack and queue in python

[nandiya]

code example for queue and stack implementation in python

[x] following rule [x] Only implement algorithms that are already in the AAA [x] only one language and one algorithm [x] already test my code

[nandiya]

@Amaras please review my code and can it be used?

[ntindle]

[lang: python]

[leios]

What is the state of this PR? I think there are a few lingering changes to be made, but after that, we now have code for stacks and queues, so this can probably be merged in

[Amaras]

I need to re-review this one for sure (wow, it's been a while). Doing that tomorrow or this weekend!