Add CosmosPay community skill

[leocagli]

Adds the CosmosPay skill to the Community skills directory. The skill documents SEP-7 payment intents, browser wallet approval, server-side validation, signed webhooks, and secure patterns for swaps, liquidity and fiat ramps using the public @cosmosapp/pay_sdk package. Source skill PR: CosmosPay/CosmosPay-Skill#1. Validation: pnpm lint:ts and pnpm test:ecosystem-links pass.

[kaankacar]

🤖 Automated message from Kaan's Automated Triage Bot.

👀 Picked this up — a review will follow shortly.

[Copilot]

Copilot review overview

🟢 Approval recommended

The reviewed change is limited to registering the CosmosPay community skill, with no unresolved issues.

Review effort: Lite
Findings: None

What changed in this PR

Adds the CosmosPay community skill to the ecosystem directory, including Stellar payment and wallet integration documentation.

Changes:

• Adds CosmosPay metadata and description.
• Links to the repository’s raw SKILL.md documentation.

File	Description
site/​src/​data/​skills.ts	Registers the CosmosPay community skill card.

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[stellar-triage-bot]

🤖 Automated message from the Stellar Triage Bot.

Thanks for the CosmosPay skill. Keeping the API key on the server and fulfilling only from a verified webhook or server validation is a good security boundary. I checked every call against the published @cosmosapp/pay_sdk@2.0.0 types. createPay, edit, validate, WebClient.pay, the asset constants and the Circle USDC issuers all match.

Two small fixes before the listing:

1. references/operations.md lists managers that do not exist. In 2.0.0, Client has no assets, wallets or addresses manager. Those are exported helpers (Assets, Wallets, addresses). The real managers also include activity and pollar.
2. references/wallets.md hand-builds a Cosmos Wallet adapter. The SDK already exports CosmosWalletAdapter and registers it by default. It covers the extension and the hosted wallet (new WebClient({ cosmos: { walletUrl } })). The hand-built copy reads globalThis.cosmosWallet once, while isAvailable() reads it live. It also does not type-check as TypeScript. Please point readers to the shipped adapter, for example with preferredWallets: [Wallets.COSMOS].

Also, please move the card to the end of ECOSYSTEM_CARDS. site/README.md asks new entries to append there.

When these are in, I will re-check and merge.