core: clean scaffolding

src/core/contractActivation.js

src/core/contractTermination.js

src/core/contractVerification.js

src/core/findUserPdl.js

src/core/types/enum.js

src/core/types/types.js

src/core/verifyUserIdentity.js

src/helpers/aggregate.js

src/helpers/parsing.js

src/index.js