* cuda graph prototype
fix signal bug + start to add dependencies
capture more
capture more ops
remaining ops
fix reduce and rope deps
add concurrent context
try update, but not working
cosistent topology order
use node api
use node api directly to reduce overhead
fix bug
use kernels in unary
cache graph
format
fix synchronization
format
* comment
* export and import functions
* refactor + works for few primitives
* nit
* allow primitives with state
* nit
* nit
* simplify serialize / deserialize
* fix for constants
* python bindings
* maybe fix serialize failure case
* add example
* more primitives, training kind of works
* same result for python and c++
* some fixes
* fix export
* template it up
* some simplificatoin
* rebase
* allow kwargs and multiple functions
* exporter
* more primitives for exporting
* deal with endianness
* handle invalid stream
* add docstring
