* ck-builder: make toString to_string
We are using snake case for CK-Builder
* ck-builder: add debug.hpp with tensor descriptor printing function
This adds some initial functionality to debug.hpp, a header which will
be used to house some debug utilities.
* ck-builder: abstract nd-iteration
Abstracting this makes it easier to test, clearer, and allows us to
use it elsewhere (such as in debug.hpp soon)
* ck-builder: tensor printing
* ck-builder: rename INT32 to I32
This makes it more in line with the other data type definitions.
