Add first workflow to fetch HEBIS Data RPB-225

[TobiasNx]

Reuse lobid transformation for Hebis Mapping

• reused almost all of the lobid transformation. Not used stuff is overhead but it makes it more easy to adjust.
• I put all maps static and test in the maps folder.

TODO:

• adjust to HEBIS and rpb specific stuff
• no holdings are provided via sru, where do we get them
• Do they provide rpb specific infos via sru?
• introduce bash script that creates the sru query and reuses them in the flux

[TobiasNx]

@fsteeg and @acka47 have a look at my transformed data from hebis including holdings from 924. This could be your basis for the strapi import.