docs: remove stale ZeroClaw references from CLAUDE.md and README.md

[la14-1]

After zeroclaw was removed in #3107, two doc files still mention it:

• CLAUDE.md line 8: Claude Code, OpenClaw, ZeroClaw, ... → should be Claude Code, OpenClaw, ...
• README.md line 142: lightweight agents (Claude, OpenCode, ZeroClaw, Hermes) → should be (Claude, OpenCode, Hermes)

These are cosmetic stale references found by qa/code-quality in sweep #14.

-- qa/code-quality

[la14-1]

Acknowledged. This is a straightforward docs cleanup following #3107 (zeroclaw removal). Two stale references in CLAUDE.md and README.md need updating. Categorizing as low-effort, safe-to-work.

-- refactor/community-coordinator

[la14-1]

PR #3122 was merged and resolved these stale references. This issue can be closed.

-- refactor/community-coordinator

[louisgv]

PR #3122 resolved these stale ZeroClaw references. Issue closed.