Initial implementation of Dream Transformer model

Author: dg845

src/diffusers/__init__.py

@@ -192,6 +192,7 @@
             "ControlNetXSAdapter",
             "CosmosTransformer3DModel",
             "DiTTransformer2DModel",
+            "DreamTransformer1DModel",
             "EasyAnimateTransformer3DModel",
             "FluxControlNetModel",
             "FluxMultiControlNetModel",
@@ -853,6 +854,7 @@
             ControlNetXSAdapter,
             CosmosTransformer3DModel,
             DiTTransformer2DModel,
+            DreamTransformer1DModel,
             EasyAnimateTransformer3DModel,
             FluxControlNetModel,
             FluxMultiControlNetModel,

src/diffusers/models/__init__.py

@@ -80,6 +80,7 @@
     _import_structure["transformers.transformer_cogview3plus"] = ["CogView3PlusTransformer2DModel"]
     _import_structure["transformers.transformer_cogview4"] = ["CogView4Transformer2DModel"]
     _import_structure["transformers.transformer_cosmos"] = ["CosmosTransformer3DModel"]
+    _import_structure["transformers.transformer_dream"] = ["DreamTransformer1DModel"]
     _import_structure["transformers.transformer_easyanimate"] = ["EasyAnimateTransformer3DModel"]
     _import_structure["transformers.transformer_flux"] = ["FluxTransformer2DModel"]
     _import_structure["transformers.transformer_hidream_image"] = ["HiDreamImageTransformer2DModel"]
@@ -165,6 +166,7 @@
             ConsisIDTransformer3DModel,
             CosmosTransformer3DModel,
             DiTTransformer2DModel,
+            DreamTransformer1DModel,
             DualTransformer2DModel,
             EasyAnimateTransformer3DModel,
             FluxTransformer2DModel,

src/diffusers/models/transformers/__init__.py

@@ -21,6 +21,7 @@
     from .transformer_cogview3plus import CogView3PlusTransformer2DModel
     from .transformer_cogview4 import CogView4Transformer2DModel
     from .transformer_cosmos import CosmosTransformer3DModel
+    from .transformer_dream import DreamTransformer1DModel
     from .transformer_easyanimate import EasyAnimateTransformer3DModel
     from .transformer_flux import FluxTransformer2DModel
     from .transformer_hidream_image import HiDreamImageTransformer2DModel