Allow aliases for dependency relationships

(Separating this from my other proposal which uses this - A-I-9378 and which provides an illustration of the value)

Considering allowing specification of aliases for the different types of linked dependency to be selectable within a workspace.

Ideally perhaps - allow multiple aliases to be defined and used for each, e.g. Depends is a type of relationship, it allows a dependency tree to be drawn, and understood from that basic aspect - but it does not say anything about the relationship.

Ideally this would be an applied label on diagrams of dependencies. For example 'Defines', 'Responsible for', 'Accountable for', 'Is informed of' etc. Especially as the newer template uses of Aha roadmaps become explored, these relationships will probably want to be tailored.

The simplest implementation is to allow an alternate alias for each relationship type to be used within a workspace hierarchy, but this seems a little restrictive.

The categories of potential interest would perhaps be 'Data model' or 'Dependency tracing'