Neo4j GenAI package for Python 0.3.0

https://github.com/neo4j/neo4j-genai-python/blob/main/CHANGELOG.md#030

Minor Changes

• GraphRAG Integration: Introducing the GraphRAG object to enable a complete Retrieval-Augmented Generation pipeline. This major feature supports context retrieval, sophisticated prompt formatting, and dynamic answer generation, streamlining the use of RAG techniques within Neo4j.
• Enhanced Customization Options: Added PromptTemplate and RagTemplate for customizable prompt generation. Also, a new result_formatter argument across all retrievers allows for tailored formatting of retrieval results, offering greater flexibility in how results are presented and utilized.
• VectorRetriever Updates: Enhanced to return metadata such as nodeLabels and id without direct embedding output, simplifying data handling.
• Developer Experience: Enhanced developer interactions with improved documentation, including a new User Guide that provides comprehensive instructions and tips for getting started and effectively using the neo4j-genai-python package.