Description of the feature request
Allow yml files to be referenced as workflows within the bitrise.yml
For example the “_setup” workflow would not be inlined in every workflow’s bitrise.yml and could be referenced using a relative path.
Use case / for what or how I would use it
When using GitHub + Bitrise API to manage a large number of workflows changing the _setup workflow must be changed in every bitrise.yml.
This would make managing Bitrise at scale much easier and allow for updating and tracking changes to yml files much easier