code: add page (#1557)

pages/common/code.md

@@ -0,0 +1,15 @@
+# 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}}`