Add JUnit formatter #70

Job	Run time
build-and-test (native, ubuntu-latest)	49s
build-and-test (native, windows-latest)	1m 47s
build-and-test (llvm, macos-13)	58s
build-and-test (native, macos-15)	18s
build-and-test (native, macos-13)	31s
build-and-test (gcc, windows-latest)	2m 1s
build-and-test (gcc, macos-15)	45s
build-and-test (llvm, ubuntu-latest)	47s
build-and-test (gcc, macos-13)	1m 27s
build-and-test (llvm, macos-15)	17s
Publish Tests Results	17s
	9m 57s

Provide feedback