feat: support for passing additional parameters from app repository to root repository using override file
As requested by @niiku , this is work inspired by: https://github.com/baloise/gitopscli/pull/174 request. It is supposed to provide capability for the users to pass additional (whitelisted) values to the root repo configuration - which may be used for enhancement purposes (i.e. labeling objects with proper team/project billing code) .
PR is not yet ready - as I would need to know - and discuss - what would be the proper way to raise errors in-line with the rest of the project - and which way will be the correct one to proceed with check "Root repository already up-to-date. I'm done here." - as the implementation of this capability will break the way ho app is behaving now.
Additionally - we would need to agree on way of overriding the whitelist, as well as locations and names of the additional yaml configuration files.