docs: add instructions for codex on windows #516

Job	Run time
Tests on ubuntu-latest with node 20	51s
Tests on ubuntu-latest with node 22	56s
Tests on windows-latest with node 23	4m 2s
Tests on ubuntu-latest with node 24	1m 11s
Tests on ubuntu-latest with node 23	1m 3s
Tests on windows-latest with node 20	1m 40s
Tests on windows-latest with node 24	2m 32s
Tests on macos-latest with node 23	1m 17s
Tests on macos-latest with node 20	1m 33s
Tests on macos-latest with node 22	1m 8s
Tests on macos-latest with node 24	1m 34s
Tests on windows-latest with node 22	2m 8s
[Required] Tests passed	3s
	19m 58s

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