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Per the spec. Perform split based on splits. If Split is a scalar use the value
in the split and split equally.

If not scalar, split along desired dimensions. Check dims accordingly so they
sum to the length of the target axes

For keepdims, only split down to new sequences if keepdims=0 otherwise use the
axes length as the output of keepdims=1

Basing this around the split operator. Need to add in other tests

Updated each source file in the repo with the existing license.

Enable a cppcheck rule to catch these redundant casts in the future

* initial testing

* initial testing

* add dequantize

* formatting

* add tests

* formatting

* revert file

* add parse files

* formatting

* add axis tuning and fix tests

* formatting

* add tests and fix int8

* formatting

* fix tidy

* test with int32

* add default name and change string to upper

* formatting

* remove boost call

* refactor to use tune_axis)

* formatting

* Load op when serializing

* Formatting

* Add missing clip field

* Use make_op almost everywhere

* Formatting

* More make ops for rnns

* Get rid of spaces

* Formatting

* Remove operators headers

* Formatting

* Remove unused op headers

* Increase line threshold

* Refactor onnx_parser class

* Formatting

* Add op_parser

* Formatting

* Remove old onnx drivers

* Use file GLOB

* Parse arg ops

* Formatting

* Add pooling

* Formatting

* Add parse_natchnorm

* Add more operators

* Formatting

* Add more operators

* Formatting

* Add more operators

* Formatting

* Add more operators

* Add rnn operators

* Formatting

* Fix tidy issues

* Formatting

* Add back missing param

* Formatting

* Fix shadow variable

* Fix shadow in declaration

* Make global constant

* Formatting

* Add generic op

* Formatting

* Add binary op

* Formatting

* Add variadiac op

* Formatting

* Remove unused fields and functions

* Set default values

* Formatting

* Remove unused member variable

* Add add literal overload

* Use info.add_literal

* Formatting

* Call add_instruction through info class

* Fix tidy issues

* Formatting
Co-authored-by: mvermeulen <5479696+mvermeulen@users.noreply.github.com>