add pyarrow as a dependency

[mschwamb]

/home/runner/work/sorcha/sorcha/src/sorcha/lightcurves/base_lightcurve.py:5: DeprecationWarning:
Pyarrow will become a required dependency of pandas in the next major release of pandas (pandas 3.0),
(to allow more performant data types, such as the Arrow string type, and better interoperability with other libraries)
but was not found to be installed on your system.
If this would cause problems for you,
please provide us feedback at pandas-dev/pandas#54466

[mschwamb]

Only an issue for pandas 3.0 so since we're on pandas 2.0, let's deal with this when we have to