sh-mug

Results 2 issues of sh-mug

Implemented `logical_not`, `logical_and`, and `logical_or` operators in NNgen. Also wrote tests for each operator. All operators are implemented using Veriloggen.Stream.

## Changes Made - Implemented the tanh activation function to the NNgen library and added support for conversion from ONNX. - Added tests for tanh. ## Testing Among the newly...