Context-driven Architecture

In this MR we identified 'category' to be a global state that is used in multiple components throughout the application. We used the React Context API to redesign the passing and handling of this state throughout the application. Navigation was streamlined, dependent components were simplified with this state extracted and maintained as a single context.

This MR also introduces updates to the packages and the framework version used. Consequently it has updates to files related to i18n in line with latest changes in dependent libraries.

Closes #120, #125 (closed)