chore: Enable pylint on project

[jfuss]

Previously, this repo did not do any linting. The linting that is enabled
is basic, as this commit disables all of what pylint was complaining about.

Issue #, if available:
Linting was not done on commits, this update changes this. The .pylintrc file was copied from our other repos (aws-sam-cli) that we maintain.

Description of changes:
Add linting and make linting run on make pr.

I will make this more useful to us in the near future by fixing some of the smaller issues and likely just forcing pylint to ignore the rest. That way new code is always linted and we can work on removing/update the "legacy" code to be cleaner.

Description of how you validated changes:
Ran make pr

Checklist:

• Add/update unit tests using:
  • Correct values
  • Bad/wrong values (None, empty, wrong type, length, etc.)
  • Intrinsic Functions
• Add/update integration tests
• make pr passes
• Update documentation
• Verify transformed template deploys and application functions as expected

Examples?

Please reach out in the comments, if you want to add an example. Examples will be
added to sam init through https://github.com/awslabs/aws-sam-cli-app-templates/

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.