refactor: 重构目录结构以支持 i18n

创建 'i18n' 目录以存放多语言内容。将所有现有的中文内容（文档、提示词、技能、README）移动到 'i18n/zh/' 中。添加了新的根 README 作为语言入口，并为英文（'en'）翻译创建了占位符结构。

skills/coingecko/SKILL.md

@@ -1,80 +0,0 @@
----
-name: coingecko
-description: CoinGecko API documentation - cryptocurrency market data API, price feeds, market cap, volume, historical data. Use when integrating CoinGecko API, building crypto price trackers, or accessing cryptocurrency market data.
----
-
-# Coingecko Skill
-
-Comprehensive assistance with coingecko development, generated from official documentation.
-
-## When to Use This Skill
-
-This skill should be triggered when:
-- Working with coingecko
-- Asking about coingecko features or APIs
-- Implementing coingecko solutions
-- Debugging coingecko code
-- Learning coingecko best practices
-
-## Quick Reference
-
-### Common Patterns
-
-*Quick reference patterns will be added as you use the skill.*
-
-## Reference Files
-
-This skill includes comprehensive documentation in `references/`:
-
-- **authentication.md** - Authentication documentation
-- **coins.md** - Coins documentation
-- **contract.md** - Contract documentation
-- **exchanges.md** - Exchanges documentation
-- **introduction.md** - Introduction documentation
-- **market_data.md** - Market Data documentation
-- **nfts.md** - Nfts documentation
-- **other.md** - Other documentation
-- **pricing.md** - Pricing documentation
-- **reference.md** - Reference documentation
-- **trending.md** - Trending documentation
-
-Use `view` to read specific reference files when detailed information is needed.
-
-## Working with This Skill
-
-### For Beginners
-Start with the getting_started or tutorials reference files for foundational concepts.
-
-### For Specific Features
-Use the appropriate category reference file (api, guides, etc.) for detailed information.
-
-### For Code Examples
-The quick reference section above contains common patterns extracted from the official docs.
-
-## Resources
-
-### references/
-Organized documentation extracted from official sources. These files contain:
-- Detailed explanations
-- Code examples with language annotations
-- Links to original documentation
-- Table of contents for quick navigation
-
-### scripts/
-Add helper scripts here for common automation tasks.
-
-### assets/
-Add templates, boilerplate, or example projects here.
-
-## Notes
-
-- This skill was automatically generated from official documentation
-- Reference files preserve the structure and examples from source docs
-- Code examples include language detection for better syntax highlighting
-- Quick reference patterns are extracted from common usage examples in the docs
-
-## Updating
-
-To refresh this skill with updated documentation:
-1. Re-run the scraper with the same configuration
-2. The skill will be rebuilt with the latest information