Implement "How It Works" Page.

[adityabhattad2021]

This PR addresses Issue #36 and implements the "How It Works" page for the Agora Blockchain application.

The key changes include:

• Routing Updates in App.js:
  • Uncommented the commented-out routes for the "How It Works" page.
  • Implemented the necessary logic to render the "How It Works" page.
• "How It Works" Link in Register.js:
  • Added a link in the Register component to route users to the "How It Works" page.
  • Applied some CSS to center the link.
• "Back to Auth" Link in "How It Works" Page:
  • Added a link in the "How It Works" page to allow users to navigate back to the authentication page.

Relevant Screenshots:

• Auth page:
  

• How it works page: