[model] add Qwen2.5-Omni model (#7537)

* preserve image_sizes

* preserve image_sizes

* init plugin

* support audio-text2text lora

* nit

* support image/video-text2text, audio-text2text

* remove args

* remove lines

* add docs && nit

* remove some comments

* fix && add merge part script

* add license

src/llamafactory/hparams/model_args.py

@@ -222,6 +222,10 @@ class ProcessorArguments:
         default=False,
         metadata={"help": "Use pan and scan to process image for gemma3."},
     )
+    use_audio_in_video: bool = field(
+        default=False,
+        metadata={"help": "Whether or not to use audio in video inputs."},
+    )
     video_max_pixels: int = field(
         default=256 * 256,
         metadata={"help": "The maximum number of pixels of video inputs."},