[Feat] ForwardDims Conv for NCHW and NHWC

Context

Now forward_dims works for NHWC and NCHW dataformat

Resolves issue #223 (closed)

Modified files

• feat: Conv.hpp, now Conv_Op::inChannels() checks if the Weight Producer format is [Cout,H,W,Cin] or [Cout,Cin,H,W];
• upd: Conv::forwardDims() accounts for weight data format (NHWC or NCHW)