Populate vscode specific configurations

The devcontainer spec has a [section](https://containers.dev/supporting#visual-studio-code) that covers the support of VS Code specific properties. I am not sure how reasonable the `customizations.vscode.settings` are for the remote since those are stored in a local user session. (In the case of coder could be in a different volume). This might actually be a better issue for them to solve on that side then. If that is your opinion please feel free to close this issue and I will move it to the coder project.

从链接的 devcontainer 规范中 VS Code 专属的部分开始，检查 Envbuilder 当前如何处理 devcontainer 属性。确定 customizations.vscode.settings 应归 Envbuilder 负责，还是应由 Coder 项目处理；只有在确定了这一归属和受支持的配置范围后，该 issue 才算完成。

由索引模型根据 Issue 内容生成。