Style - update backend operator function names to use Add as needed

spellcheck

Ceed - add IsDeterministic

style - rename AssembleLinear* to LinearAssemble*

style - change Get*Status to Is*

ElemRestriction - add check for strided status

ElemRestriction - add state counter for reading offsets array

ElemRestriction - add ElemRestrictionGetOffsets

Restriction - convert restiction to use offsets instead of interlace mode. CPU and Python impl only, CUDA and MAGMA left to do.

Remove unreachable break statements

LCOV - shift markers to avoid extranious misses

Restriction - replace identity restrictions with strided restrictions

ElemRestriction - make lmode a separate enum

ElemRestriction - move lmode to constructor over apply

Opt - clean up Operator create code

CPU - add comment blocks at top of all backend functions

Operator - Add OperatorApplyAdd, implement for CPU, OCCA backends

Basis - Use CEED_VECTOR_NONE for EVAL_MODE_WEIGHT

CPU - clean up qvecsout via increasing references

CPU - update identity qf assemby error message

make sytle

QFunction - Refactor CreateIdentity to include inmode and outmode

CPU - avoid extra memcpy for identity qfunctions

Make tidy

Make style