Add Liked list part in dsa part

[kaushal1717]

I want to add the Linked List part to the DSA folder. Please assign this to me for contributing under hacktoberfest.

[github-actions]

Hi 😄, thanks for creating your first contribution at Official-Website, do read and follow the Contribution Guidelines while contributing.

[nsundriyal62]

@kaushal1717

buddy,

actually i almost completed it

but you can go further

try to do it asap

[kaushal1717]

So you want to do it then you go further I'll work on other one