Remove vendored openclaw package and orchestrating skill; align MCP name to agent-relay (#1034)

* Remove vendored openclaw package; rename MCP server to agent-relay

OpenClaw lives in its own repo (AgentWorkforce/agent-relay-openclaw); the
copy under packages/openclaw was a stale duplicate re-added after the
split and nothing in relay depends on it. Drop it (and its package-lock
entries + the CI build step).

Also align the customer-facing MCP surface with the binary name:
- CLI uninstall now cleans up the `agent-relay` .mcp.json key and the
  legacy `relaycast` key.
- Refresh the orchestrating-agent-relay skill for the v8 `local` CLI
  surface, relay-only messaging, and the `mcp__agent-relay__*` tools.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* style: auto-format with Prettier

* Remove vendored orchestrating-agent-relay skill

The skill is maintained in AgentWorkforce/skills
(skills/orchestrating-agent-relay); the copies under .claude/ and
.agents/ in relay were stale duplicates. Updated canonical version:
AgentWorkforce/skills#69.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: 3 people