coords_to_indices requires iterable

[jeromaerts]

Based on student feedback:

Can we make it possible to pass non-iterables and iterables to the function coords_to_indices?

ewatercycle/src/ewatercycle/models/wflow.py

Lines 182 to 184 in 71bcc30

	def _coords_to_indices(
	self, name: str, lat: Iterable[float], lon: Iterable[float]
	) -> Iterable[int]:

[BSchilperoort]

This could be addressed by modifying set_value_at_coords so it can take either a float or Interable[float], and turning the floats into a tuple of floats before passing to _coords_to_indices.

https://github.com/eWaterCycle/ewatercycle/blob/a8fe6e577d6696fbe5f66599de4a26dc3dab637c/src/ewatercycle/base/model.py#L213C9-L213C28