expose common types on types package

[christianalfoni]

This is a preparation for Typescript refactor.

• The common/src/types.ts file is moved to common/src/types/index.ts
• The tsconfig.json of app now has a shortcut path named "types" to this moved file

This allows ut to put all typings in a single folder and expose them through ../types/index.ts. It also allows to import any type by:

import { Sandbox, Module } from 'types'

I think this will clean up a lot and make things more consistent, also preventing duplicate typing. All application wide types should be defined in this folder so you always know where to look :-)

[CompuIves]

Beautiful!