ggml webgpu: support for rope,div,sub,glu,scale,cont operators (llama/16187)

ggml webgpu: support for rope,div,sub,glu,scale,cont operators (llama/16187)

* Work on rope

* Simplify inplace operation generation and combine mul/add generation

* Work on rope variants

* implement neox rope

* rope complete

* Add sub,div,glu operators

* implement scale op

* Update cpy shader to handle cont/more types

* formatting

* Update test vars printing for rope,rms_norm

* Avoid ROPE hardcoded constants

* Add TODO to change ROPE constants to enum

Co-authored-by: Georgi Gerganov <redacted>
* fix TODO comment

---------

Co-authored-by: Georgi Gerganov <redacted>