Rather than using `require` we can add a type definition file, this allows us
to add custom types in the future if we want. We need to add some config for
ts-node to pick up the types correctly.
refs https://github.com/TryGhost/Team/issues/3294
- The factory method for the Collection and validations should live close together based on our latest architectural direction
refs https://github.com/TryGhost/Team/issues/3167
- The core client (API) needs a way to pass in information without an ID when creating a new entity, handling it on service/repository layer makes the most sense.
- Used "require" syntax to import tpl/errors modules, otherwise TS compiler was complaining about type compatibility issues, this works as a temporary workaround and is tracked and an issue to improve in the future.
closes https://github.com/TryGhost/Team/issues/3166
- The collections service contains CRUD logic to manage collection entities through: save, getById, getAll, and destroy methods.
