fix: adding coordinate features

x,y,z coordinate features are useful for plotting.

Author: lachlangrose

LoopStructural/utils/features.py

@@ -0,0 +1,5 @@
+from ..modelling.features import LambdaGeologicalFeature
+
+X = LambdaGeologicalFeature(lambda pos: pos[:, 0], name="x")
+Y = LambdaGeologicalFeature(lambda pos: pos[:, 1], name="y")
+Z = LambdaGeologicalFeature(lambda pos: pos[:, 2], name="z")