High-Level Load API with Background Event Loop

This release completes Phase 1 of the mcp2py implementation, providing
a production-ready Python interface to MCP servers.

- 🚀 load() function: Simple, synchronous API to any MCP server
- ⚡ Background event loop: Seamless async/sync bridge in thread
- 🔧 Dynamic tool methods: MCP tools become Python methods
- 📦 Subprocess management: Launch, maintain, and cleanup servers
- 🐍 Pythonic names: Automatic camelCase → snake_case conversion
- 📄 Result unwrapping: Clean content without MCP envelope
- 🧹 Context manager: Automatic resource cleanup
- ❗ Better errors: Helpful messages with available tools

User Code (Sync) → load() → MCPServer → AsyncRunner → MCPClient → Official SDK

- src/mcp2py/event_loop.py (42 LOC) - Background event loop
- src/mcp2py/loader.py (22 LOC) - load() function
- src/mcp2py/server.py (56 LOC) - MCPServer wrapper
- src/mcp2py/schema.py (18 LOC) - Utilities

- ✅ 55/55 tests passing (33 new tests)
- ✅ 92% code coverage
- ✅ mypy --strict clean
- ✅ Full type safety

```python
from mcp2py import load

server = load("python server.py")

result = server.echo(message="Hello!")
result = server.add(a=5, b=3)

server.close()

with load("python server.py") as server:
    result = server.some_tool(arg="value")
```

None - First release with load() API

- Maxime Rivest (@maximerivest)
- Claude Code (implementation assistant)

🎉 Ready for Phase 2: .tools attribute, resources, prompts!