chore(r2devops): add r2.yml file [skip ci]

files:

    template: ./templates/gitlab-ci-sbt.yml

    documentation: ./README.md

    changelog: ./CHANGELOG.md

data:

    description: "Build, test and analyse your sbt-based projects"

    public: true

    labels:

    - to be continuous

    - Build

    license: LGPL v3

    deprecated: false