chore(processor): add Step suffix to all processors (#1854)

* refactor(processor): rename MapDeltaActionToRobotAction and MapTensorToDeltaActionDict for consistency

* refactor(processor): rename DeviceProcessor to DeviceProcessorStep for consistency across modules

* refactor(processor): rename Torch2NumpyActionProcessor to Torch2NumpyActionProcessorStep for consistency

* refactor(processor): rename Numpy2TorchActionProcessor to Numpy2TorchActionProcessorStep for consistency

* refactor(processor): rename AddTeleopActionAsComplimentaryData to AddTeleopActionAsComplimentaryDataStep for consistency

* refactor(processor): rename ImageCropResizeProcessor and AddTeleopEventsAsInfo for consistency

* refactor(processor): rename TimeLimitProcessor to TimeLimitProcessorStep for consistency

* refactor(processor): rename GripperPenaltyProcessor to GripperPenaltyProcessorStep for consistency

* refactor(processor): rename InterventionActionProcessor to InterventionActionProcessorStep for consistency

* refactor(processor): rename RewardClassifierProcessor to RewardClassifierProcessorStep for consistency

* refactor(processor): rename JointVelocityProcessor to JointVelocityProcessorStep for consistency

* refactor(processor): rename MotorCurrentProcessor to MotorCurrentProcessorStep for consistency

* refactor(processor): rename NormalizerProcessor and UnnormalizerProcessor to NormalizerProcessorStep and UnnormalizerProcessorStep for consistency

* refactor(processor): rename VanillaObservationProcessor to VanillaObservationProcessorStep for consistency

* refactor(processor): rename RenameProcessor to RenameProcessorStep for consistency

* refactor(processor): rename TokenizerProcessor to TokenizerProcessorStep for consistency

* refactor(processor): rename ToBatchProcessor to AddBatchDimensionProcessorStep for consistency

* refactor(processor): update config file name in test for RenameProcessorStep consistency

tests/processor/test_diffusion_processor.py

@@ -25,13 +25,13 @@ from lerobot.constants import ACTION, OBS_IMAGE, OBS_STATE
 from lerobot.policies.diffusion.configuration_diffusion import DiffusionConfig
 from lerobot.policies.diffusion.processor_diffusion import make_diffusion_pre_post_processors
 from lerobot.processor import (
+    AddBatchDimensionProcessorStep,
     DataProcessorPipeline,
-    DeviceProcessor,
-    NormalizerProcessor,
-    RenameProcessor,
-    ToBatchProcessor,
+    DeviceProcessorStep,
+    NormalizerProcessorStep,
+    RenameProcessorStep,
     TransitionKey,
-    UnnormalizerProcessor,
+    UnnormalizerProcessorStep,
 )
 
 
@@ -89,15 +89,15 @@ def test_make_diffusion_processor_basic():
 
     # Check steps in preprocessor
     assert len(preprocessor.steps) == 4
-    assert isinstance(preprocessor.steps[0], RenameProcessor)
-    assert isinstance(preprocessor.steps[1], NormalizerProcessor)
-    assert isinstance(preprocessor.steps[2], ToBatchProcessor)
-    assert isinstance(preprocessor.steps[3], DeviceProcessor)
+    assert isinstance(preprocessor.steps[0], RenameProcessorStep)
+    assert isinstance(preprocessor.steps[1], NormalizerProcessorStep)
+    assert isinstance(preprocessor.steps[2], AddBatchDimensionProcessorStep)
+    assert isinstance(preprocessor.steps[3], DeviceProcessorStep)
 
     # Check steps in postprocessor
     assert len(postprocessor.steps) == 2
-    assert isinstance(postprocessor.steps[0], DeviceProcessor)
-    assert isinstance(postprocessor.steps[1], UnnormalizerProcessor)
+    assert isinstance(postprocessor.steps[0], DeviceProcessorStep)
+    assert isinstance(postprocessor.steps[1], UnnormalizerProcessorStep)
 
 
 def test_diffusion_processor_with_images():
@@ -294,11 +294,11 @@ def test_diffusion_processor_mixed_precision():
     # Get the steps from the factory function
     factory_preprocessor, factory_postprocessor = make_diffusion_pre_post_processors(config, stats)
 
-    # Replace DeviceProcessor with one that uses float16
+    # Replace DeviceProcessorStep with one that uses float16
     modified_steps = []
     for step in factory_preprocessor.steps:
-        if isinstance(step, DeviceProcessor):
-            modified_steps.append(DeviceProcessor(device=config.device, float_dtype="float16"))
+        if isinstance(step, DeviceProcessorStep):
+            modified_steps.append(DeviceProcessorStep(device=config.device, float_dtype="float16"))
         else:
             modified_steps.append(step)