docs: split per-library history out of the root index into ZB.MOM.WW.*/CLAUDE.md files
Claude-Session: https://claude.ai/code/session_01Wzg6NUCWHipSexLs2cgRFv
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Claude-Session: https://claude.ai/code/session_01Wzg6NUCWHipSexLs2cgRFv