[docs] Add MaskGenerationPipeline in docs (#27063)

* add `MaskGenerationPipeline` in docs

* Update __init__.py

* fix repo consistency and clarify docstring

* add on check docstirngs

* actually we do have a tf sam

* oops

docs/source/en/main_classes/pipelines.md

@@ -481,6 +481,12 @@ Pipelines available for multimodal tasks include the following.
     - __call__
     - all
 
+### MaskGenerationPipeline
+
+[[autodoc]] MaskGenerationPipeline
+    - __call__
+    - all
+
 ### VisualQuestionAnsweringPipeline
 
 [[autodoc]] VisualQuestionAnsweringPipeline

src/transformers/__init__.py

@@ -672,6 +672,7 @@ _import_structure = {
         "ImageToImagePipeline",
         "ImageToTextPipeline",
         "JsonPipelineDataFormat",
+        "MaskGenerationPipeline",
         "NerPipeline",
         "ObjectDetectionPipeline",
         "PipedPipelineDataFormat",
@@ -4814,6 +4815,7 @@ if TYPE_CHECKING:
         ImageToImagePipeline,
         ImageToTextPipeline,
         JsonPipelineDataFormat,
+        MaskGenerationPipeline,
         NerPipeline,
         ObjectDetectionPipeline,
         PipedPipelineDataFormat,

utils/check_docstrings.py

@@ -356,6 +356,7 @@ OBJECTS_TO_IGNORE = [
     "M2M100Config",
     "M2M100Tokenizer",
     "MarkupLMProcessor",
+    "MaskGenerationPipeline",
     "MBart50TokenizerFast",
     "MBartConfig",
     "MCTCTFeatureExtractor",