Add Bookkeeper Support

[ShahanaFarooqui]

Currently, Greenlight does not support integration with the Bookkeeper plugin, which is an accounting system designed for Core Lightning nodes. By adding Bookkeeper support, Greenlight nodes would gain enhanced accounting capabilities, enabling users to track and manage financial data (e.g., payments, invoices, forwards, and channel balances) more effectively. This would provide users with better insights into their node's financial activity and improve overall node management.