New Algorithm - A5/1 cipher implementation

[hemil26]

I would like to implement this cipher in python and would like to contribute to this repository, If you think this would be appropriate addition to this repository can you please assign it to me!
Thank you!

[poyea]

https://en.wikipedia.org/wiki/A5/1

[nirbhay12345]

@hemil26 are you working on this issue? If not can I work on this?

[hemil26]

@nirbhay12345 you can work on it!

[nirbhay12345]

@poyea Please assign this to me

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[nirbhay12345]

@poyea please assign me this issue