feat: Add py.typed marker file for proper typing support
- Add py.typed marker file to jambo package directory - Enable static type checkers to recognize and use type annotations from the library This allows IDEs and tools like mypy, pyright to properly type-check code using this library. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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