Social Icons Integration on Login and Signup Page

[aashimawadhwa]

Is your feature request related to a problem? Please describe.
yes, Improving social reach of the palisadoes organization

Describe the solution you'd like
Social icons of Talawa should be added to the login page and signup page of both user and admin portal, each redirecting to the respective social platform.

Describe alternatives you've considered
NA.

Approach to be followed (optional)
The login page should include social icons for all Talawa platforms, each redirecting to the respective platform.

Additional context

Add slack icon also

Potential internship candidates
Please read this if you are planning to apply for a Palisadoes Foundation internship PalisadoesFoundation/talawa#359

[aialok]

I would love to work on this issue : )

[palisadoes]

This PR was merged prematurely, we wanted you to make the Palisadoes Logo clickable so that the official website would open.