G2Plot 如何给轴标签添加图片

### 🐛 Question description [Please make everyone to understand it]
如图，在G2Plot中如何实现这种给轴标签添加图片的功能

### 💻 Link to minimal reproduction

Please provide a link by forking these links [g2plot](https://codesandbox.io/s/g2plot-reproduction-template-gyej1) or GitHub repo. What is a minimal reproduction, and why is it required?

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

* **G2Plot Version**:
* **Platform**:

The issue asks how to add images to axis labels in G2Plot and includes a screenshot, but names no implementation files or tests. Start with the linked G2Plot CodeSandbox reproduction template and inspect the axis-label documentation and examples. Done would be a confirmed implementation path or documented example for the requested label appearance.

Written by the indexing model from the issue text.