Enforce whether the direction of an arrow can point towards or away from each connection port on a custom shape

[chris-hampel-CA]

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Is your feature request related to a problem? Please describe.
Not a problem, but the feature would allow for new customization that would help prevent user errors when building out diagraming conventions for other users.

Describe the solution you'd like
I would like the ability to enforce "directionality" of connections on custom shapes. For example, in process engineering, a pump shape has one inlet and one outlet connection port, and the direction of connector flows can only go from "left to right" (aka uni-directional). In theory, a user could connect arrows drawn from right to left but this case does not make "visual sense".

Enforcing connection types that only allow arrows to point towards or away from certain ports would prevent users from making diagrams that do not make "visual sense".

Describe alternatives you've considered

• rely on users to know which connection ports on a custom shape correspond to "inlet and outlet" ports such that the diagram is drawn correctly

Additional context
n/a