[CLI] lb4 repository relation support

[virkt25]

Description / Steps to reproduce / Feature proposal

If a user defines two models (TodoList, Todo) and defines a relation TodoList hasMany Todo then we should be able to recognize this during repository generation.

This isn't applicable if a repository for a model was defined before a relation was added to the model.

Acceptance Criteria

• Based on the model the repository is being created for, detect any relational properties in the Model (ex: @hasMany, @belongsTo). For each relational property:
  • Prompt: Select repository for the Todo model so we can power the hasMany relation property todos. Provide an option of available repositories -- select a default based on naming convention, with the last option being to skip this (In which case we don't add any relation stuff to the repository).
• Create a repository with the applicable relation related code (template iterates over each relational property and adds the appropriate code for linking the repositories).
• Tests + Docs + Blog

[virkt25]

related to #1359 -- Can't be estimated till the discussion there is resolved.

[stale]

This issue has been marked stale because it has not seen activity within six months. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository. This issue will be closed within 30 days of being stale.

[stale]

This issue has been closed due to continued inactivity. Thank you for your understanding. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository.