add chinese for pages.cn/linux/add-apt-respository.md

pages.cn/common/code.md

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+# code
+
+> Visual Studio Code.
+
+- Open VS Code:
+
+`code`
+
+- Open the current directory in VS Code:
+
+`code .`
+
+- Open a file or directory in VS Code:
+
+`code {{path/to/file_or_folder}}`
+
+- Open a file or directory in the currently open VS Code window:
+
+`code --reuse-window {{path/to/file_or_folder}}`
+
+- Compare two files in VS Code:
+
+`code -d {{file1}} {{file2}}`