sorting imports on save; cleanup imports sorting; add isort check (#207)

nerfactory/fields/modules/__init__.py

@@ -13,6 +13,6 @@
 # limitations under the License.
 
 """init field modules"""
+from .base import FieldModule
 from .encoding import Encoding, ScalingAndOffset
 from .mlp import MLP
-from .base import FieldModule

nerfactory/fields/modules/embedding.py

@@ -19,6 +19,7 @@ Code for embeddings.
 
 import torch
 from torchtyping import TensorType
+
 from nerfactory.fields.modules.base import FieldModule
 
 

nerfactory/fields/modules/mlp.py

@@ -15,7 +15,7 @@
 """
 Multi Layer Perceptron
 """
-from typing import Tuple, Optional
+from typing import Optional, Tuple
 
 import torch
 from torch import nn