[Question] Lack Cypher doc in website

[liketemple]

Problem Type (问题类型)

configs (配置项 / 文档相关)

Before submit

• 我已经确认现有的 Issues 与 FAQ 中没有相同 / 重复问题 (I have confirmed and searched that there are no similar problems in the historical issue and documents)

Environment (环境信息)

任意环境~

Your Question (问题描述)

readme中有写支持cypher语言，但在文档中没有找到和cypher语言相关的api描述。 只是在源码CypherAPI.java中看到了：

@Path("graphs/{graph}/cypher")
@Singleton
public class CypherAPI extends API {

希望能有对应的api文档支持，谢谢。

Vertex/Edge example (问题点 / 边数据举例)

No response

Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)

No response

[imbajin]

refer #2143

@lynnbond could u provide a basic doc for users to use? (add them in doc repo)