Add Workflow toml support

[JensKrumsieck]

workflow.toml which could be the main sciwin config file for repos

[workflow]
name = "my-workflow"
description = "a workflow that does ... things!"
version = "0.1.0"
authors = ["Derp Derpson", "Dudette Derpson"]
license = "MIT"
keywords = ["workflow"]   

[github-actions]

Package	Line Rate	Health
crates/remote-execution/src	77%	✔
src/commands	69%	➖
crates/cwl-execution/src	70%	➖
crates/cwl/src	79%	✔
src	75%	➖
Summary	74% (2898 / 3895)	➖