Add style check, unit test and clippy to CI pipeline +

[hansonchar]

Add build status badge + Build rpm and deb, uploading build artifacts

Issue #, if available:

Description of changes:

1. Add style check, unit test and clippy to CI pipeline
2. Add build status badge
3. Build rpm and deb, uploading the built artifacts

Sample run of workflow:

https://github.com/hansonchar/aws-kms-xks-proxy/actions/runs/3221193449/jobs/5268893319

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

Check any applicable:

• [ ] Were any files moved? Moving files changes their URL, which breaks all hyperlinks to the files.