Support ReadDir, ChDir and Stat to perform Dir related operations

[vipul-rawat]

Currently, the filesystem does not have the reading the directory functionality to find information about the directory contents, similar to os.ReadDir()

Edit: Found some more missing functions that could be useful in a fileSystem - ChDir(to change the dir), Stat(to retrieve information about a file or dir)

[coolwednesday]

@vipul-rawat Please, assign the issue to me.

[Umang01-hash]

@vipul-rawat Please, assign the issue to me.

Assigned!