serverless
Add customization options for Serverless action
Resolves #21 Resolves #33 Resolves #69 Resolves #77 Resolves #84
Allows a user to specify a serverless-version or defaults to latest.
Allows a user to specify a working-directory or defaults to ..
Throws an error if no args are passed (with an error message).
Includes an aws-credentials flag under with: to automatically add --use-local-credentials to the end of args.
Allows a user to pass a list of plugins in install-packagages to be installed before running args.
Updates action.yml and README.md.
Note: Because it calls /entrypoint.sh instead of serverless directly, specifying the /bin/sh entrypoint will include arguments passed to /entrypoint.sh. Hence I recommend bumping to v4 as this could be considered a breaking change.
Testing: https://github.com/ryanlawson/actions-test/actions/runs/9142765035/job/25138829111
