xby-ancient-poetry-kg: Ancient Poetry Knowledge Graph Plugin

The `xby-ancient-poetry-kg` plugin by DSH aims to provide agents with structured knowledge retrieval capabilities in the domain of classical Chinese poetry. Built on knowledge graph technology, it covers data such as poem titles, authors, and dynasties, helping address the challenges models face when handling complex entity relationships. Core capabilities include setting a persistent API key, retrieving the graph schema, and executing Cypher queries. Developers must first register on the official website to obtain an API key and install the plugin via GitHub, after which they can use tools such as `set_xby_apikey`, `get_schema`, and `execute_read_cypher` to read and interact with graph data.