Shape inference and show input/output shape of each node

[ExplorerRay]

This is the dependency of #12. Without calculating shape first, it will be unavailable to do further calculations.

• Implement functions with C++
• Write pytest for new functions

[ExplorerRay]

I have done something in this branch, but there are still many things need to be done.

• Different dimension node support
  • Check attribute default value by input dimension
• More node operator types
• More attributes support

[ExplorerRay]

Another thing came to my mind which is about setting custom input shape if there is no default one. Maybe infer_shapes(std::vector<int64_t> start_shape).

• Custom input shape at start for shape inference