Add JUnit formatter #76

Job	Run time
build-and-test (native, macos-15)	31s
build-and-test (llvm-18, macos-15)	42s
build-and-test (llvm-18, ubuntu-latest)	58s
build-and-test (gcc-14, ubuntu-latest)	54s
build-and-test (gcc-14, windows-latest)	1m 53s
build-and-test (llvm-18, macos-13)	1m 54s
build-and-test (native, windows-latest)	2m 5s
build-and-test (native, ubuntu-latest)	47s
build-and-test (gcc-14, macos-15)	44s
build-and-test (gcc-14, macos-13)	1m 35s
Publish Tests Results	16s
	12m 19s

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