Add a deprecation notice to the top of the README about saws

[pol]

saws is much better than aws-shell for me. I am unable to do variable interpolation in aws-shell (like: DOMAIN=foo aws command with --option $DOMAIN), and it also can't use loops. It is super convenient to be able to do: for i in {1..10}; do aws command with --option thing-$i; done. And all of the awesome consequences of patterns like that.

So for me, aws-shell is a non-starter. Long live saws.

[sidewinder12s]

I have been wondering if both aren't dead since aws-shell hasn't been updated in a while either.

[AnthonyWC]

saws commit history is actually more active than aws-shell.

[jeffbyrnes]

@donnemartin care to weigh in, as it’s your repo?

[Braynid]

I was wondering about this as well. I see this repo is way more active than aws-shell. @donnemartin would saws be deprecated any time soon?

[jeffbyrnes]

Considering @donnemartin has made commits as recently as a week ago, I'm going to close this. We'll see what the future brings!