add crypto price checker skill

[yudhissatriya]

Add Crypto Price Checker Skill

What’s This?

This PR adds the crypto_price_checker skill to IntentKit. It fetches crypto prices, market cap, 24h volume, and 24h price change (e.g., Bitcoin) using CoinGecko API.

Changes

• Skill: crypto_price_checker in coingecko category.
• Function: Uses CoinGecko’s free /simple/price endpoint to get data for a coin (e.g., "bitcoin") in a currency (e.g., "usd").
• Files:
  • skills/coingecko/base.py: Base class.
  • skills/coingecko/crypto_price_checker.py: Skill logic.
  • skills/coingecko/__init__.py: Skill loader.
  • skills/coingecko/schema.json: Config schema.
  • skills/coingecko/coingecko.png: Icon.
• Dependency: Added httpx (poetry add httpx).
• Config: Add to agent.yaml (in root or config/):

  id: coingecko-agent
  skills:
    coingecko:
      states:
        crypto_price_checker: public