Add JUnit formatter #82

Job	Run time
build-and-test (native, windows-latest)	2m 27s
build-and-test (native, macos-15)	32s
build-and-test (gcc-14, ubuntu-latest)	58s
build-and-test (llvm-18, windows-latest)	2m 32s
build-and-test (llvm-18, ubuntu-latest)	52s
build-and-test (native, ubuntu-latest)	46s
build-and-test (gcc-14, macos-13)	1m 39s
build-and-test (gcc-14, macos-15)	41s
build-and-test (llvm-18, macos-15)	39s
build-and-test (llvm-18, macos-13)	2m 36s
Publish Tests Results	9s
	13m 51s

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