Clean up and open source

[OlivieFranklova]

Description

For ease of access and use we would like to open source this tool

TaskList

• clean up any Absa specific information
• clean up all URLs
• Add CONTRIBUTING.md
• Add License headers
• Add LICENSE.md
• Add Issue Templates
• Make sure branches are proteceted
• Add codeowners
• Add release action with Artifact (jar) upload and automatic release notes
• Add to this README link and status message
• Remove Aquasec steps
• Rename package from africa.absa to za.co.absa