Added
- `newCollaboratorRole()`, `getCollaboratorRoles()`, `newExperimentTemplate()`, `getExperimentTemplates()`,
`newEntityStateWorkflow()`, `getEntityStateWorkflows()` to `Workspace` model
- `newExperimentTemplate()`, `getExperimentTemplates()`,`newEntityStateWorkflow()`, `getEntityStateWorkflows()`, to`User` model
- `EntityStateWorkflow` model and repository
- `EntityState` model and repository
- `CollaboratorRole` model and repository
- `CollaboratorRoleRequirement` model and repository
- `SignatureRequirement` model and repository