refactor: rename AbstractPositionNDDifferential

Signed-off-by: nstarman <nstarman@users.noreply.github.com>

src/coordinax/_dn/base.py

@@ -1,6 +1,6 @@
 """Representation of coordinates in different systems."""
 
-__all__ = ["AbstractPositionND", "AbstractPositionNDDifferential"]
+__all__ = ["AbstractPositionND", "AbstractVelocityND"]
 
 
 from abc import abstractmethod
@@ -82,7 +82,7 @@ def reshape(self, *hape: Any, order: str = "C") -> "Self":
         return replace(self, q=self.q.reshape(*hape, self.q.shape[-1], order=order))
 
 
-class AbstractPositionNDDifferential(AbstractVelocity):
+class AbstractVelocityND(AbstractVelocity):
     """Abstract representation of N-D vector differentials."""
 
     @classproperty

src/coordinax/_dn/cartesian.py

@@ -20,7 +20,7 @@
 from unxt import Quantity
 
 import coordinax._typing as ct
-from .base import AbstractPositionND, AbstractPositionNDDifferential
+from .base import AbstractPositionND, AbstractVelocityND
 from coordinax._base import AbstractVector
 from coordinax._base_pos import AbstractPosition
 from coordinax._utils import classproperty
@@ -233,7 +233,7 @@ def _mul_vcnd(lhs: ArrayLike, rhs: CartesianPositionND, /) -> CartesianPositionN
 
 
 @final
-class CartesianVelocityND(AbstractPositionNDDifferential):
+class CartesianVelocityND(AbstractVelocityND):
     """Cartesian differential representation.
 
     Examples