Generalise edge.py to build/deploy to support multiple services/models/pipelines

[archena]

Is your feature request related to a problem? Please describe.
Currently the reference example only allows one model in a repository (with hardcoded paths). We need to support multiple training, management and deployment of multiple models.

Describe the solution you'd like

• edge.yaml configuration should support multiple model fields
• edge.py should support commands for adding and removing models from the configuration
• edge.py vertex commands should have model name as a parameter
• model paths should be inferred from the configuration, rather than hardcoded

Describe alternatives you've considered
For the second point (having commands for adding and removing models), the alternative is to ask about all of the models in the configuration wizard on the initial setup. However, this solution is suboptimal

Additional context
Add any other context or screenshots about the feature request here.