Fix genetic crash

[shreyadesai20042009]

Related Issue / Discussion:

Fixes Issue #164

Relates to discussion #164

Changes:
Please list the central functionalities that have been changed:

Modified WeatherRoutingTool/algorithms/genetic/init.py to add proper guards in Genetic.terminate() for cases when no feasible solution exists.

Further Details:
Summary:

This pull request addresses a crash in the genetic algorithm when no feasible solution is found.

Before this PR:

When the genetic algorithm returned no feasible solutions (e.g., due to water_depth constraints), res.F and res.X were None.
Genetic.terminate() attempted to access res.F.argmin(), causing an AttributeError and crashing the program.

After this PR:

Added checks in Genetic.terminate() to verify res, res.F, and res.X are not None or empty.
If no feasible solution exists, a descriptive exception is raised:
No feasible solution found, all candidates violated constraints. Please rerun.

This ensures the algorithm fails gracefully and provides clear feedback to the user.

Dependencies:
No new dependencies are required.

PR Checklist:

In the context of this PR, I:

• have (already previously) filled the 52North Contributor License Agreement and received positive feedback on this matter
• have filled the 52North Contributor License Agreement and am waiting for feedback
• provide unit tests embedded in the WRT test framework (WeatherRoutingTool/tests) that allow the simple testing of the new/modified functionalities. All (previous and new) unit tests execute without new error messages.
• ensure that the code formatter runs without errors/warnings
• ensure that my changes follow the WRT’s guidelines for contributing at the time of the contribution