* feat(lint): add php-cs-fixer for linting
Removing previous CODE_STYLE as it was not enforced anyway and using PER-CS 2.0.
This is not the reformatting commit.
* style: format code according to PER-CS 2.0 with php-cs-fixer
* ci(actions): add lint action
Resolves#1132.
* ci(actions): try using docker/build-push-action
no pushes yet ofc
* ci(actions): try using multilines to provide env vars
* ci(actions): use full form env vars providing
* ci(actions): try load flag
* ci(actions): add uploading of built images as artifacts
* ci(actions): use oci export type
* ci(actions): try generating metadata with docker/metadata-action@v5
* ci(actions): individual tagging policy fo db images
* ci(actions): improve prefixes for db images
* ci: use matrix for different platforms
* ci(actions): move DB images building to a different job
* ci(actions): add labels to images
* ci(actions): add running on pull_requests
* ci(actions): return pushing to registry
