See also https://zenn.dev/himkt/articles/8e44abfa5caca7 for the introduction.
> wget https://github.com/himkt/cargo-atcoder-vscode/releases/download/v0.0.10/cargo-atcoder-vscode-0.0.10.vsix
> code --install-extension cargo-atcoder-vscode-0.0.10.vsixvsce package