Unsupported `linear` `Resize` node with `candle_onnx`

Trying to run frame interpolation model with `candle_onnx`, and getting error `Unsupported resize mode: linear`.

Example onnx node:

```
- /core_model/Resize: Resize
- coordinate_transformation_mode: s="half_pixel", i=0
- cubic_coeff_a: f=-0.75, i=0
- mode: s="linear", i=0
- nearest_mode: s="floor", i=0
```

The issue identifies candle_onnx Resize handling and the unsupported `linear` mode, but names no source file or test. Start by locating the Resize implementation and the code producing this error; done means the supplied ONNX node runs successfully with `linear` mode and existing behavior remains covered by tests.

Written by the indexing model from the issue text.