Initial release of the Vestaboard skill.

- Read and write messages to a Vestaboard using the Vestaboard Cloud API or legacy RW endpoint.
- Supports displaying text, updating messages, showing short status, simple color pixel-art, and reading current board state.
- Requires secure token via environment variables (`VESTABOARD_TOKEN`, optional legacy `VESTABOARD_RW_KEY`).
- Automatically formats text input for Vestaboard’s 6x22 layout (uppercase, word wrap, truncates overflow).
- Includes CLI tools for previewing, reading, and writing board content.