feat(claude): add trust-web3-provider Claude Code skill

[vcoolish-tw]

Summary

• Adds .claude/skills/trust-web3-provider.md — a Claude Code skill that helps developers integrate and build on top of this library
• Covers both integration patterns (Promise mode, Callback mode) and how to build new chain providers

What the skill includes

• Quick start — minimal setup for Promise and Callback adapter strategies
• Handler routing — how to dispatch by params.network + params.name, with full MobileAdapter method name mapping table
• All 7 chain providers — Ethereum, Solana, Cosmos, Bitcoin, Aptos, TON, Tron with config options and key methods
• Multi-chain setup — registering multiple providers under a single handler
• Building new chains — step-by-step guide using bun run generate, provider skeleton, MobileAdapter template, type definitions
• Error handling — EIP-1193 error codes and RPCError usage
• Events reference — when and how to emit chainChanged, accountsChanged, etc.
• Common pitfalls — troubleshooting table for the most frequent integration mistakes
• Build commands — monorepo dev workflow

Usage

Developers with Claude Code can invoke this skill with /trust-web3-provider in any project to get contextual, accurate guidance for integrating or extending the library.