Add CITATION.cff for repository citation metadata (#738) #4579

Job	Run time
pre-commit / check-file-sizes	6s
pre-commit / pre-commit	2m 11s
windows / msvc-build (Release)	4m 26s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 21s
windows / msvc-build (Debug)	4m 7s
windows / clang-build	2m 47s
ubuntu / gcc-build (ubuntu-24.04, Release)	2m 19s
ubuntu / clang-build (ubuntu-24.04)	2m 56s
mac / clang-build (Debug)	1m 57s
mac / clang-build (Release)	1m 51s
mac / clang-test	4m 14s
windows / clang-test	4m 19s
windows / msvc-test	4m 51s
ubuntu / gcc-test (ubuntu-24.04)	8m 28s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	3m 18s
ubuntu / clang-test (ubuntu-24.04)	8m 24s
windows / clang-test-extended	3m 29s
mac / clang-test-extended	2m 48s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	3m 0s
windows / msvc-test-extended	3m 7s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 31s
ubuntu / gcc-test-extended (ubuntu-24.04)	4m 29s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 33s
ubuntu / gcc-build-codecov	7m 19s
perf / macos-clang-build-perf-stats	2m 3s
perf / ubuntu-gcc-build-perf-stats	1m 30s
pages / build-doxygen-xml	19s
pages / build-scoreboard	17s
pages / build-sphinx	41s
pages / deploy-pages	0s
	1h 34m 41s

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