docs: lead with code map and evidence log public names

[solomonneas]

Summary

• README and overview lead with code map (brigade code) and evidence log (brigade evidence), keeping GraphTrail and MiseLedger as historical names.
• Optional stations table lists Bootstrap Doctor against the full OpenClaw bootstrap set (SOUL, TOOLS, AGENTS, IDENTITY, MEMORY, and related files).
• Kitchen metaphor stays brand art; commands stay plain. Wiring and station-contract docs get dual-name intros.

Why

Operator CLI on 0.25.x already speaks brigade code / brigade evidence. Docs and the GitHub README still taught old product names.

Test plan

• Docs-only change
• Confirm README on main after merge

[coderabbitai]

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