Create basic html structure for the About us and Contact us pages

[sasmitaditya13]

Is your feature request related to a problem? Please describe.
To start creating the About us and Contact us pages, we first need to create a basic html structure.

Describe the solution you'd like
In the blank html files (aboutsus.html and contactus.html), make a simple html structure on which further components can be added.

Additional context
This issue must be solved before proceeding into other issues of About Us and Contact Us pages.