doc - note CEED_QFUNCTION macro creates abspath

doc - add gpu dev notes

style - fix trailing spaces in non-linted files

OperatorAtPoints (#1390)

* op - add AtPoints interface

* op - reorder AtPoints QFunction for consistency

* op - add CEED_EVAL_WEIGHT for operator AtPoints

* doc - add CeedOperatorCreateAtPo

OperatorAtPoints (#1390)

* op - add AtPoints interface

* op - reorder AtPoints QFunction for consistency

* op - add CEED_EVAL_WEIGHT for operator AtPoints

* doc - add CeedOperatorCreateAtPoints to release notes

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ctx - add Boolan field register/set/get/restore

release - update version number and notes

doc - clarify delegation/fallback with an example

op - remove CeedOperatorSetNumQuadraturePoints

Merge pull request #1339 from CEED/jeremy/spelling

Spelling is hard

Support CPU shared-memory parallelism with OpenMP (#1279)

* Updates for OpenMP thread safety (one Ceed per thread, potentially with shared output vector)

* Makefile tabs vs. spaces consistency

Support CPU shared-memory parallelism with OpenMP (#1279)

* Updates for OpenMP thread safety (one Ceed per thread, potentially with shared output vector)

* Makefile tabs vs. spaces consistency

* Fix unrelated pragma bug for Intel compilers in `backend.h`

* Address PR feedback: Use _OPENMP macro, simplify OpenMP pragma wrappers

* Address PR feedback: Add new statement macro CeedPragmaThreadPrivate to PREDEFINED entries in Doxyfile

* Add OpenMP support to Intel CI workflow for testing

* Add documentation for OPENMP option and Update releasenotes.md

* Revise OpenMP implementation: Rather than enforcing global variables to be threadprivate, just wrap potential race conditions in a critical block (during registration)

* Avoid returning from OpenMP blocks

* Early break on error when registering backends or QFunctions

* Formatting fixes after rebase, newline after variable declarations

* Address PR feedback: Revert some unintentional changes to debug output

* Update codecov exclusions

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minor - spelling is hard

Add CeedOperatorLinearAssemblePointBlockDiagonalSymbolic

doc - further explain change from COLLOCATED to NONE

interface - rename CEED_BASIS_COLLOCATED to CEED_BASIS_NONE

Update releasenodes.md and AUTHORS

doc - update release notes

doc - fixup errors

Add sycl/ref and sycl/shared backends (#1229)

* Merge sycl_backend from ALCF fork

---------
Co-authored-by: Umesh Unnikrishnan <unnikrishnan@anl.gov>
Co-authored-by: Kris Rowe <krowe@anl.gov>

Add sycl/ref and sycl/shared backends (#1229)

* Merge sycl_backend from ALCF fork

---------
Co-authored-by: Umesh Unnikrishnan <unnikrishnan@anl.gov>
Co-authored-by: Kris Rowe <krowe@anl.gov>
Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

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doc: fix math in headers

There is a bad hyperref/unicode-math interaction apparently resulting
from how PDF bookmarks work. This replaces math in headers (section
titles) with unicode Greek letters

doc: fix math in headers

There is a bad hyperref/unicode-math interaction apparently resulting
from how PDF bookmarks work. This replaces math in headers (section
titles) with unicode Greek letters to fix doc-latexpdf.

https://tex.stackexchange.com/questions/570000/improper-alphabetic-constant-error-in-title-with-greek-bug-with-unicode-math-an

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doc(fluids): Add differential filtering

Merge pull request #1149 from CEED/jrwrigh/newtonian_ddsgs

fluids: Data-driven SGS modeling

doc(fluids): Document SGS, data-driven model

doc: update to altair-5.0 and sphinext-altair

https://github.com/altair-viz/altair/issues/3051#issuecomment-1546730887

doc - pin Altair <5.0 until Sphinx updates

examples/petsc: Remove unneeded PETSC_VERSION_LT

- We now require greater than 3.19 anyways

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>