Add moonlit waves

[Hyeonjeong-JANG]

Checklist

• JSON is valid
• category matches the directory
• description is concise (under ~100 characters)
• url points to a live page
• Logo included in public/logos/ (SVG or PNG, under 50KB) and referenced in JSON as "logo": "/logos/your-project.svg"
• If adding a skill, install_command uses npx skills add format

[vercel]

@Hyeonjeong-JANG is attempting to deploy a commit to the x402 Eco Team on Vercel.

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[chugue]

Hi team! 👋 Just a friendly follow-up — this PR adds Moonlit Waves to the x402 ecosystem page. It's a live music store on Base mainnet with 280+ AI-generated tracks, all purchasable via x402 micropayments ($0.05 USDC/track). Would love to get this reviewed and merged when you get a chance. Happy to make any changes if needed. Thanks!