Init repo: CI files, pipelines, formatters or linters, and all the good stuff we use in AbsaOSS in general

[lsulak]

As the title says. Inspiration can come from any of these:

• https://github.com/AbsaOSS/fa-db
• https://github.com/AbsaOSS/atum-service
• https://github.com/AbsaOSS/balta