v0.16.0

• 支持对话中 mermaid 流程图渲染

• 支持代码块插入到思源文档中

• 代码块插入到思源文档前，需用鼠标点击一下待插入的位置（此位置应是一个思源块）

• Support mermaid flowchart rendering in conversation

• Support inserting code blocks into Siyuan documents

• Before inserting code blocks into Siyuan documents, you need to click the position where you want to insert with the mouse (this position should be a Siyuan block)