simplify_baml 0.2.0

Simplified BAML runtime for structured LLM outputs using native Rust types with macros
Documentation
# Development Commands

## Build & Test

```bash
cargo build          # Build
cargo test           # Run all tests
cargo build --release  # Release build
```

## Run Examples

```bash
cargo run --example with_macros           # Full macro demo
cargo run --example extract_person_macro  # Basic extraction
cargo run --example nested_macro          # Nested structures
cargo run --example openrouter_example    # Multi-provider
cargo run --example streaming_with_schema_structure  # Streaming
```

## Environment Variables

```bash
export OPENAI_API_KEY="sk-..."
export OPENROUTER_API_KEY="..."  # For multi-provider examples
```

## Code Style

- No comments unless code is complex
- Follow existing patterns in neighboring files
- Use `anyhow::Result` for error handling