* add builtin-type DenseTensorType Float16Type Float64Type Int16Type Int64Type

* refine comment

* refine comment

* add classof for Type class

* refine test code

* add get param func for DenseTensorType

* add dyn_cast and refine isa

* set default WITH_NEWIR=OFF

* refine cast_utils

* Refine code by comment

* refine code by comment

* refine code by comment

* refine code by comment

* fix bug of dyn_cast

* set WITH_NEWIR=OFF

* refine code by comment