Add working with files conten (#2305)

* added the complete guide to work with files using fs Module and a blog link is attached with it.

* Update fs content

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/107-nodejs/content/105-nodejs-working-with-files/readme.md

@@ -1 +1,6 @@
-# Nodejs working with files
+# Working with Files
+
+You can programmatically manipulate files in Node.js with the built-in `fs` module. The name is short for “file system,” and the module contains all the functions you need to read, write, and delete files on the local machine.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.digitalocean.com/community/tutorials/how-to-work-with-files-using-the-fs-module-in-node-js'>How To Work with Files using the fs Module in Node.js</BadgeLink>