Version >2.6 of Pydantic require Field names to be different from type annotations

[benjaminleighton]

https://docs.pydantic.dev/2.6/errors/usage_errors/#unevaluable-type-annotation

This happens for example in

rompy/rompy/schism/namelists/cosine.py

Line 253 in f3b4af9

MARCO: MARCO = MARCO()

because

MARCO the type is potentially confused with MARCO the field name on the COSINE class one of the ways to resolve this is
to define a new variable to hold the type/class with a different name and use that like

MARCO_AS_TYPE = MARCO
...
MARCO: MARCO_AS_TYPE = Field(..., description="MARCO parameters")

[tomdurrant]

Ok, noted. These namelists are not currently used, so let me now if this is causing any issues with the current CSIRO implementation, if so, I'll just remove the imports, otherwise, I will wait for the full namelist implementation to fix