Add JUnit formatter #72

Job	Run time
build-and-test (native, ubuntu-latest)	47s
build-and-test (native, windows-latest)	2m 7s
build-and-test (gcc, macos-13)	1m 43s
build-and-test (native, macos-13)	37s
build-and-test (llvm, macos-13)	1m 10s
build-and-test (gcc, macos-15)	46s
build-and-test (native, macos-15)	17s
build-and-test (llvm, ubuntu-latest)	53s
build-and-test (llvm, macos-15)	21s
build-and-test (gcc, windows-latest)	2m 7s
Publish Tests Results	14s
	11m 2s

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