Part of hyperhive#1898 (b), the other missing docs subdir. Unlike
turn-loop/ this one has no single existing file that already covers
the whole directory - hivectl.md/hivectl-cli.md are genuinely
operator-facing (the operator's own host CLI), while bash.md/forge.md/
lifecycle.md/matrix.md/scheduling.md document the agents' own MCP tool
surface (a different audience: what the agent can do, not what the
operator does). Writes a new README.md rather than moving one,
splitting the link list along that line so the operator-relevant half
leads.
