Add JUnit formatter #80

Job	Run time
build-and-test (llvm-18, ubuntu-latest)	46s
build-and-test (native, windows-latest)	1m 56s
build-and-test (native, macos-15)	32s
build-and-test (native, ubuntu-latest)	46s
build-and-test (llvm-18, macos-13)	2m 16s
build-and-test (gcc-14, ubuntu-latest)	56s
build-and-test (llvm-18, windows-latest)	2m 12s
build-and-test (gcc-14, macos-15)	48s
build-and-test (gcc-14, macos-13)	1m 30s
build-and-test (llvm-18, macos-15)	40s
Publish Tests Results	16s
	12m 38s

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