[codex] add naxytra x402 ecosystem entry

[naxytra]

What changed

• Added a new x402 ecosystem listing for naxytra under typescript/site/app/ecosystem/partners-data/naxytra/metadata.json.

Why

• x402's ecosystem page wants a public listing for projects building with x402.

Impact

• naxytra now has a public x402 ecosystem entry that points to the canonical machine discovery index.
• The listing describes the x402 payment lane.
• The ecosystem UI can render logo-free entries cleanly when a real logo is not available.

Validation

• Parsed the new metadata.json locally.
• Confirmed the branch is pushed to the naxytra/x402 fork.

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