Introduced dependency on 'npm-fullfat-registry'

Introduced dependency on 'npm-fullfat-registry' to allow syncing attachments from skim repositories.
Updated .gitignore to prevent IDEA project files to be included in future commits.


## Rationale

because the majority of public facing repositories do not provide the binary attachments it is important to have a mean to also fetch and add them to the `to` repository.

Major thanks to @jvale for help from the beggining
sorry, please use 2 spaces to indent.