refs https://github.com/TryGhost/DevOps/issues/45
- this moves the bulk of the tsconfig file to the `ghost/` folder and
simply extends this file in each of the TS lib packages we currently
have
- this makes it a lot easier to make single changes to our TS config
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.
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.
