Summary: Deepstash adds extensive topic library and quiz

Why It Matters: The site now shows a massive list of specific topics and a new onboarding quiz. This helps people find exactly what they want to learn and makes the experience feel more personal from the start.

What Changed:

• Added a large directory of "Idea Categories" covering topics like Mental Health, Business, and Science.
• Introduced a new interactive quiz asking users "What brings you to Deepstash?" with goals like "Increase Productivity" or "Earn More Money."
• Added a "Supercharge your mind" email signup box at the bottom of the page.
• Included specific content previews like "Inside the Mind of Elon Musk" and "The Genius of DaVinci."
• Updated the layout to include more direct links to curated collections and library topics.