extend layer maxpool

This MR includes the following changes:

1. Extended the MaxPool feature to support a wider range of kernel sizes and strides, and to include support for GlobalMaxPool operations. GlobalMaxPool performs max pooling across the entire input feature map, rather than just over local neighborhoods as in standard max pooling.
2. Provided three test models: maxpool_k2_s2.onnx, maxpool_k3_s3.onnx, and global_maxpool.onnx.

looks good. Thank you for providing the tests. merging

merged

mentioned in commit db459ffa