ice model added to Delft3D 4

[goede2606]

What was done

• This Delft3D 4 branch, in which an ice model has been added, is only built to generate an AlmalInux 8 executable of this Delft3D-FLOW version with an ice model, so that client(s) can run simulations with this ice model.
• The current and old research version of this code (NB. in SVN) generates a CentOS-7 executable, which can't be run on AlmaLinux 8 machines.
• Therefore the ice model ice has been programmed in the Delft3D 4/Delft3D FM main version of early January 2026.
• THE GOAL IS NOT TO MERGE THIS FUNCTIONALITY IN THE MAIN OF THE DELFT3D (FM) SYSTEM.
• So, it isn't necessary that these code changes will be reviewed. It is the responsibility of @goede2606 that this new research branch will generate comparable ice model results compared to the previous (CentOS based) executable of this ice model.

Evidence of the work done

• Video/figures
  <add video/figures if applicable>
• Clear from the issue description
• Not applicable

Tests

• The TeamCity AlmaLInux 8 executable generated in this issue is downloaded and tested outside TeamCity
• When the ice model results are OK (i.e. comparable with previous research versions), then this executable will be send to the client, without any guarantees.
• Tests updated
  <add testcase numbers if applicable, Issue number>
• Not applicable

Documentation

• Documentation updated \
• Not applicable

Issue link