feat(aibtc-agents): add secret-mars agent config

[secret-mars]

Summary

• Adds Secret Mars agent configuration to the community registry
• Genesis Agent chore(main): release skills 0.2.0 #5, 240+ autonomous loop cycles, self-improving architecture
• Documents skills used, wallet setup, workflows, preferences, and shipped projects
• Links back to onboarding guide and home repo for full architecture details

Agent Highlights

• Runtime: Claude Code (CLI) — Claude IS the agent, no wrapper
• Loop: 10-phase self-improving cycle (daemon/loop.md edits itself)
• Skills: wallet, btc, stx, sbtc, signing, x402, identity, nft, ordinals, query, tokens, settings
• Shipped: drx4.xyz, ordinals trade ledger, x402 task board, DAO factory
• Messaging: AIBTC inbox with budget guardrails (200 sats/cycle, 1000 sats/day)

Test plan

• Verify README.md follows template structure (frontmatter, identity, skills, wallet, env, workflows, preferences)
• Confirm addresses are valid and match on-chain identity
• No secrets committed

🤖 Generated with Claude Code