How to add new type support

Things to know

1. Hpt has vector and scalar implementation. To support new type, you will need to go to hpt-types crate.

How

1. Go to hpt-types/src/dtype.rs.
2. Implement TypeCommon for new type, implement CudaType for new type if the new type is supported in cuda
3. Add Dtype variant for the Dtype enum.
4. Go to hpt-types/src/scalars/, based on the existing implementation for primitive type, implement the traits for new type.
5. Go to hpt-types/src/vectors/, based on the existing implementation for primitive type, implement the traits for new type.
6. Go to hpt-types/src/convertion.rs, add type conversion for the new type, add to_new_type method in traits.
7. Go to hpt-types/src/promotion/, add type promotion for new type.