Config validation in CI

[sharique]

I used Drupal9CI project 1-2 yrs and after using now, I feel that it quite matured now. It is much simpler to configure CI and tweak it as well. I've been using Acquia BLT so far, compared to BLT this tool is much simpler.
For me one thing that is still missing is the configuration validation. Once that is done, I can completely replace BLT with Drupal9CI.

One more suggestion, can we rename project DrupalCI as it works for Drupal 8,9, and 10 and will also work few more releases.