fix: transformation of pitch dimensions should update coordinate system

Fixes PySport#407: Transforming the pitch dimensions of a dataset with a coordinate
system will now change the dataset's coordinate system to
a `CustomCoordinateSystem` with the specified pitch dimensions.

As a side effect, makes it easier to create a custom coordinate system:

```
from kloppy.domain import CustomCoordinateSystem

my_coordinate_system = CustomCoordinateSystem(
	origin=...,
	vertical_orientation=...,
	pitch_dimensions=...,
)
```