no level = wildcard (can transition to any level) (#23) #181

Job	Run time
msvc (Debug)	3m 55s
macos (macos-x86_64, macos-13)	3m 19s
formatting	43s
macos (macos-arm64, macos-14)	1m 57s
msvc (Release)	3m 46s
linux (linux-amd64-release, linux-amd64)	27s
linux (linux-arm64-release, linux-arm64, qemu-aarch64-static)	28s
linux (clang-tidy)	4m 17s
linux (linux-sanitizer)	42s
linux (linux-debug, valgrind --leak-check=full --error-exitcode=1)	1m 39s
docker	26s
	21m 39s

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