onnx inference: support whole observation dictionary as input to the onnx model #52
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The current implementation of the onnx inference only takes into account the "obs" key from each agent's observation dictionary. The changes in this PR allow each aspect of the observation to be used as input to the onnx model.
For this change, the 'obs' parameter of ONNXInference.RunInference is changed from Godot Array to Godot Dictionary. This actually aligns the implementation with the current documentation in 'docs/ONNXInference.xml/Run' that states: "<param name="obs">Dictionary containing all observations.</param>".
This PR should be non-breaking and is related to this PR (but it is not depending on it to work): [edbeeching/godot_rl_agents/pull/231]
Please let me know if any changes or information are necessary to get this merged.