dir: add page (#1567)

pages/windows/dir.md

@@ -0,0 +1,19 @@
+# dir
+
+> List directory contents.
+
+- Show the contents of the current directory:
+
+`dir`
+
+- Show the contents of a given directory:
+
+`dir {{path/to/directory}}`
+
+- Show the contents of the current directory, including hidden ones:
+
+`dir /A`
+
+- Show the contents of a given directory, including hidden ones:
+
+`dir {{path/to/directory}} /A`