Berry — 可扩展的 .NET 模块化 RAG 与向量检索框架，包含 Embeddings、VectorStore、RAG 示例与前端演示。Berry — A modular, extensible .NET framework for Retrieval-Augmented Generation (RAG) and vector search, with built-in Embeddings, VectorStore, RAG samples and a front-end demo.