Added mkdir command

commands/mkdir.js

@@ -0,0 +1,20 @@
+//importing filesystem
+const fs = require('fs');
+
+//function making the directory
+function mkdir(path, FolderName = "New") {
+    var new_path = path.concat(FolderName);
+
+    fs.mkdir(new_path, (err) => {
+        if (err) {
+            console.log("Folder with this name already exists.");
+        } else {
+            console.log(`Folder ${FolderName} created`);
+        }
+    });
+
+
+}
+
+//exporting the mkdir function
+module.exports = mkdir;