Add WASI (WebAssembly) cross compile support #176

Job	Run time
build-test (ubuntu-latest, gcc, amd64)	19m 45s
build-test (ubuntu-latest, gcc, c)	24m 39s
build-test (ubuntu-latest, clang, amd64)	21m 22s
build-test (ubuntu-latest, clang, c)	29m 32s
build-test (ubuntu-latest, clang, llvm)	30m 42s
build-test (macos-13, clang, amd64)	50m 17s
build-test (macos-13, clang, c)	48m 58s
build-test (macos-13, clang, llvm)	50m 51s
build-test (macos-14, clang, c)	26m 29s
build-test (macos-14, clang, llvm)	29m 43s
build-test (windows-latest, gcc, amd64)	43m 35s
build-test (windows-latest, gcc, c)	46m 5s
	7h 1m 58s

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