Add action count to commit message - Extend current commit message to not only list new/updated/removed services/actions

[TryTryAgain]

As suggested glassechidna/trackiam#7 ... to make the commit message more useful at a glance.

So, for example, the message from:

"New Services: 'networkmonitor'. Added actions to 'codecommit,networkmonitor,sagemaker'."

Would become something like:
"New Services: 'networkmonitor'. Added 1 action for 'codecommit', 12 actions for 'networkmonitor', and 1 action for 'sagemaker'."

That issue from trackiam reminded me I've wanted to extend the readability/usefulness of the aws-iam-actions-list commit messages. I've wondered if it should even go as far as including all actions but that seems excessive (it is in the git commit/diff one click away after all). Either way, I think adding the count (total actions, added/removed, for that service) is a great idea...and I'll look to add that going forward. I wouldn't want to break people's forks but I would be willing to force change old commit messages to include that information retroactively too...not sure how that would work or if people would oppose it; that is what I did when I hard-forked the project that inspired this one to go from generic commit messages like "added actions" just like trackiam is currently doing.