Organizing Typescipt API

[RobinTail]

First I wanna keep every helper using typescript factory in one place.
This should allow to use "integration helpers" file for bigger and higher order entities of the code production.
That will be helpful for #2280 that makes "integraton" file even bigger and less readable.

[coveralls-official]

coverage: 100.0%. remained the same
when pulling 011bc5e on org-ts-api
into 76e8d11 on make-v22.

[RobinTail]

ok, good