Property editor: Show description of each property

One of the main use cases I'm thinking of for the Property Editor is to help new developers discover what some of the main properties are, and what they do. To make such discovery easier I propose we show a bit of domentation text next to each property.

Sample visualization (see small text below the properties):

首先定位 DevTools 中的 Property Editor 入口点，并查看其属性当前是如何呈现和记录的。当每个属性旁边都显示一段与建议的可视化相匹配的简洁描述时，这项工作就完成了。

由索引模型根据 Issue 内容生成。