add Makefile. add github workflow for master. update to Go 1.20

[miparnisari]

Issue #, if available: N/A

Description of changes:

• Remove go dep which was deprecated in 2020
• Update to Go 1.20
• Add makefile
• Add Github workflow for master branch
• Fix Readme
• Fix some linting issues

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