### Details:
- Dev documentation for the existing
[internal::RMS](70142121c1/src/common/transformations/include/ov_ops/rms.hpp)
op
(specified as is without any additional features, to be developed and
updated if needed)
- RMS was created initially as a [custom gpu
RMS](9fadb5ac64/src/plugins/intel_gpu/include/intel_gpu/op/rms.hpp)
operation, and it's going to be moved to op::internal::RMS to be
available for common transformations
- Similar approach as it was done for AUGRUCell/AUGRUSeqence, so the
place for such documents has been already agreed and it's not a part of
the official web docs tree
### Tickets:
- 134914, dicsussion 129027
b71eab2555