* add artifacts section
* adding and removing artifacts
* delete code for add/remove; add tests
* fix pre-commit
* remove extra piece of writing to dvc.yaml
* remove extra piece
* simplify kwargs
* allow same names for artifacts in different dvc.yaml files
* set ID as path; don't return dvc.yaml(s) with no artifacts
* fix PR feedback
* issue warning at incorrect artifact name
* issue warning at incorrect artifact name
* reference right schema
* add r to regexp
* add tests for regexp
* set artifacts for SingleStageFile
* fix windows test
* make path required; simplify regexp and remove slash from it
* allow to use gto's artifacts.yaml
* remove extra piece of code for migration from gto
Alexander Guschin