feat: Update Hero Section Content for Improved User Engagement

[akshay0611]

Summary: This PR updates the content of the hero section to improve clarity, engagement, and accessibility. The changes aim to better communicate the value of Youdemi and encourage users to explore the platform.

Changes Made:

• Rewrote the descriptive paragraph to focus on interactive courses and user motivation.
• Changed button texts:
  • Primary: "Start Learning Today"
  • Secondary: "Explore Courses"

Testing:

• Verified responsiveness across different screen sizes.
• Ensured alignment with existing CSS styles and framework conventions.

Related Issue: Closes #5