Adding all supported runtimes?

Given that the [official binaries](https://cef-builds.spotifycdn.com/index.html) cover all platforms that .NET Core/5 can run on, would it be feasible/worth it to package the others too?

I may be able to help if that's something the project owner(s) might consider useful.

Thanks!

首先，检查适用于 .NET Core/5 所支持平台的官方 CEF 二进制文件，并将其与项目当前的 NuGet 重新打包进行比较。确定是否应打包额外的运行时，并记录完成这项工作所需的平台和打包范围。

由索引模型根据 Issue 内容生成。