Windows CI

Convert `crystal.1` manpage to asciidoc #15382

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Run time

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Job	Run time
x86_64-windows-dlls	1m 22s
x86_64-windows-llvm-libs	19s
x86_64-windows-libs	1m 23s
x86_64-windows-llvm-dlls	18s
x86_64-windows-release / build	10m 31s
x86_64-windows-test	24m 59s
x86_64-windows-test-interpreter	6m 1s
x86_64-windows-installer	0s
	44m 53s