feat: OpenClaw Skill — install flow + ClawhHub listing

[OneStepAt4time]

M2.3 + M2.4 — Install + Publish

Parent: #440 (Roadmap)
Milestone: M2 — OpenClaw Skill
Depends on: #446, #447

Install flow

• Skill must work with standard OpenClaw skill install mechanism
• README includes install instructions
• setup-mcp.sh runs on first use to configure MCP connection

ClawhHub listing

• Create listing on https://clawhub.com
• Include: description, screenshots/demo, install command
• Badge in Aegis README linking to ClawhHub page

Acceptance criteria

• Fresh OpenClaw install → add skill → configure Aegis → working in <5 minutes
• ClawhHub page live and discoverable

[OneStepAt4time]

Closing as completed by merged PR #1066, which improved the OpenClaw skill install flow and ClawHub release metadata.