Add a temporary publishing operator for Clara Render Server before the App SDK viz module is ready (#173)

* Add the temp publisher operator to publish dataset for the Clara render server.

Signed-off-by: mmelqin <mingmelvinq@nvidia.com>

* Changed made after checking coding style.

Signed-off-by: mmelqin <mingmelvinq@nvidia.com>

* Removed unused imports to fix PR CI/CD errors

Signed-off-by: mmelqin <mingmelvinq@nvidia.com>

* Use the Path API as the `path` is a Path obj

Author: MMelQin

monai/deploy/operators/__init__.py

@@ -19,6 +19,7 @@
     InferenceOperator
     MonaiSegInferenceOperator
     PNGConverterOperator
+    PublisherOperator
 """
 
 from .dicom_data_loader_operator import DICOMDataLoaderOperator
@@ -28,3 +29,4 @@
 from .inference_operator import InferenceOperator
 from .monai_seg_inference_operator import MonaiSegInferenceOperator
 from .png_converter_operator import PNGConverterOperator
+from .publisher_operator import PublisherOperator