Add MultiGPU support for various model loaders and encoders

web/docs/LoadWanVideoClipTextEncoderMultiGPU.md

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+# LoadWanVideoClipTextEncoderMultiGPU
+
+`LoadWanVideoClipTextEncoderMultiGPU` loads WanVideo CLIP vision/text encoders on the device you specify, making it easy to keep encoders off your primary compute GPU when memory is tight.
+
+## Inputs
+
+### Required
+
+| Parameter | Data Type | Description |
+| --- | --- | --- |
+| `model_name` | `STRING` | CLIP vision or text encoder model from `ComfyUI/models/clip_vision` or `ComfyUI/models/text_encoders`. |
+| `precision` | `STRING` | Weight precision for the model (`fp16`, `fp32`, or `bf16`). |
+
+### Optional
+
+| Parameter | Data Type | Description |
+| --- | --- | --- |
+| `device` | `STRING` | Target MultiGPU device to host the encoder. |
+
+## Outputs
+
+| Output Name | Data Type | Description |
+| --- | --- | --- |
+| `wan_clip_vision` | `CLIP_VISION` | Loaded CLIP vision/text module ready for image conditioning. |
+| `load_device` | `MULTIGPUDEVICE` | Device that now owns the encoder; feed into `WanVideoClipVisionEncode`. |