Refactor Wan model structure by renaming and relocating model imports from model.py to wan2.py, enhancing code organization and clarity across the Wan2 module.

mlx_video/models/ltx_2/__init__.py

@@ -4,4 +4,4 @@ from mlx_video.models.ltx_2.config import (
     LTXModelType,
     TransformerConfig,
 )
-from mlx_video.models.ltx_2.ltx import LTXModel, X0Model
+from mlx_video.models.ltx_2.ltx_2 import LTXModel, X0Model

mlx_video/models/ltx_2/generate.py

@@ -33,7 +33,7 @@ from mlx_video.models.ltx_2.conditioning import (
     apply_conditioning,
 )
 from mlx_video.models.ltx_2.conditioning.latent import LatentState, apply_denoise_mask
-from mlx_video.models.ltx_2.ltx import LTXModel
+from mlx_video.models.ltx_2.ltx_2 import LTXModel
 from mlx_video.models.ltx_2.transformer import Modality
 from mlx_video.models.ltx_2.upsampler import load_upsampler, upsample_latents
 from mlx_video.models.ltx_2.video_vae import VideoEncoder