Included a precice adapter for coupling of simulations to other softwares

Description

Latest implementations regarding the precice adapter.

Link to userdocu MR: userdocu!153

Check before assigning to a maintainer for review

• The history is clean (squashed into meaningful commits and commit messages)
• New Code is well-documented, understandable and according to our standard (see our contributing guide)
• In case of new functionality, there is a fast test case (also mentioned in the description, <1 second, <1 MB, see here for more information)
• Every commit passes the pipeline
• There are no new build warnings on cdash/pipeline on any build (see pipeline jobs)
• In case of new functionality link userdocu MR

Maintainer checks before merge

• Above mentioned points are completed
• Review is approved, and all comments are resolved
• New tests are actually running (e.g. check if they appear on CDash)

Additional information

For additional information (labels, when does a pipeline run, etc.) look here