Draft: feat: copy metadata from yac source

Feature Description

Copies metadata from the yac source.

• we only consider the "cf" subtree of the metadata. This needs to be implemented in ICON.

Closes #11

Needs icon/icon-mpim!707

Checklist

• One feature per merge request!
• Try to incorporate at the very least, one test for your feature (white-box test)
• In best case, the black-box test is written by the MR reviewer
• Compile code with your preferred compiler locally first!
• Test on different compilers (TBD)
• Ensure CI is passing