[Model] feat: FastGen DMD2-distilled Wan 2.1 pipelines (T2V, I2V) (#2749)

Signed-off-by: ayushag <ayushag@nvidia.com>

vllm_omni/diffusion/models/dmd2/__init__.py

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+from vllm_omni.diffusion.models.dmd2.mixin import DMD2PipelineMixin
+
+__all__ = [
+    "DMD2PipelineMixin",
+]