RFC 886: Making Hotswap Faster (#887)

This is a request for comments about improvements to hotswap that will
make it faster. See #886 for
additional details. 

APIs are signed off by @rix0rrr .

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_By submitting this pull request, I confirm that my contribution is made
under
the terms of the Apache-2.0 license_

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Co-authored-by: aws-amplify-bot <aws@amazon.com>

Author: ShadowCat567