[CircleGraph] Support onnx

[glistening]

Now, CircleGraph can show onnx.

onnx.js, onnx-proto.js and onnx-metadata.json are copied from original netron r5.2.1.

To avoid name conflicts with others (e.g. tflite, circle), all occurrences of $root are replaced with onnx_root from onnx-proto.js.

ONE-vscode-DCO-1.0-Signed-off-by: Sanggyu Lee sg5.lee@samsung.com

[glistening]

Just for recording, I add more explanation why I chosen onnx-* from r5.2.1.

In short, the latest onnx-* does not work with old one in CircleGraph. view.Parameter is renamed to Argument and there is no more getter arguments(). It makes trouble while accessing arguments. For example,

_{media/CircleGraph/view.js}

  renderGraph(model, graph) {
        ...
        const rotate = graph.nodes.every(
          (node) =>
            node.inputs.filter((input) =>
              input.arguments.every((argument) => !argument.initializer)
            ).length === 0 && node.outputs.length === 0
        );