Dynamic onnx

[stqwzr]

Small changes for creating dynamic onnx and the converting to tensorrt. Attached image input and output shapes will look like this. (Image after onnx visualization netron)

Tested with multiple batch sizes to ensure the model performs efficiently and correctly with dynamic input shapes. Also attached the screen of successfull converting to tensorrt by using trtexec only

Please review the changes and provide any feedback if needed. Thank you!