[Feature Request] Add additional fields to exported docs

Right now, it's very difficult to parse the exported docs. I've mostly been able to figure stuff out, but there's a bit of information the exported JSON file does not expose, which I would like to suggest.

• A field for which class something originates from, to filter out unchanged methods/fields from parents
• A relative version of file, instead of an absolute path
• A version of the description which does not include markdown for params and return values, since those are separate
• Whether a function is deprecated or not
• A way to hide a field or method from the docs export (---@nodoc?)
• Maybe a way to not export inherited fields/methods? The exported file for my project is more than a million lines long...

首先定位导出的文档 JSON 实现，以及为函数、方法和字段组装字段的代码。检查当前如何表示继承、文件路径、描述和弃用；完成标准是确定一致同意的范围，并添加覆盖所选导出字段以及 nodoc 或继承行为的测试。