fix: correct tilt_interp parameter type in compute_tilt_angles_for_fl… (#1192)

* fix: correct tilt_interp parameter type in compute_tilt_angles_for_floating_turbines

- Change tilt_interp parameter type from dict[str, interp1d] to interp1d|None
- This aligns with the function's actual usage where it expects a single interpolation function or None

* Match type-hint formatting

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Co-authored-by: misi9170 <39596329+misi9170@users.noreply.github.com>
Co-authored-by: zhb <zhang.hongbing@meteodyn.com>
Co-authored-by: misi9170 <michael.sinner@nlr.gov>

Author: 3 people

floris/core/rotor_velocity.py

@@ -152,7 +152,7 @@ def compute_tilt_angles_for_floating_turbines_map(
 
 def compute_tilt_angles_for_floating_turbines(
     tilt_angles: NDArrayFloat,
-    tilt_interp: dict[str, interp1d],
+    tilt_interp: interp1d | None,
     rotor_effective_velocities: NDArrayFloat,
 ) -> NDArrayFloat:
     # Loop over each turbine type given to get tilt angles for all turbines