M3 #32: SDK examples: Market data, trading, and market making

[joaquinbejar]

Summary

Adds comprehensive example applications demonstrating how to use the Rust and TypeScript SDKs for common use cases.

Changes

Rust SDK Examples (sdk/examples/)

File	Description
market_data.rs	Fetch and display market info, order book, trades
user_data.rs	Fetch user orders, trade history, and balances
README.md	Setup instructions and usage documentation

TypeScript SDK Examples (ts-sdk/examples/)

File	Description
market-data.ts	Fetch market data via HTTP client
place-order.ts	Build place order transactions
stream-book.ts	WebSocket order book streaming
simple-mm.ts	Educational market maker example
README.md	Setup instructions and usage documentation

Technical Decisions

• Rust examples: Focus on HTTP client capabilities (market data, user data) since transaction building is not yet implemented in the SDK
• TypeScript examples: Include WebSocket and transaction building examples to demonstrate full client capabilities
• Market maker example: Clearly marked as educational only, not production-ready
• Environment variables: All examples use env vars for configuration (API URL, market address, etc.)

Example Features

Each example includes:

• Clear comments explaining each step
• Error handling with informative messages
• Configuration via environment variables
• Devnet setup instructions in README

Testing

• Rust examples compile (cargo clippy passes)
• TypeScript SDK tests pass (60 tests)
• Documentation complete

Checklist

• Code follows project guidelines
• Documentation included
• No warnings from cargo clippy

Closes #32