Improve workflows in the offline/testing mode

[MetRonnie]

• [x] Currently we have only one workflow (one) in the demo/offline mode (yarn run serve). This limits the ability to manually test out GScan in this mode. We should add multiple workflows including hierarchical ones (e.g. a/b/c/run1). #1416
• [ ] We also should have a workflow with more than 1 cycle point.

Pull requests welcome!