feat(frontend): build About page and FAQ accordion page for the marketing section

[portableDD]

Description

The footer links to About and FAQ but both return 404. New visitors have no way to learn about the platform mission, understand the team, or find answers before signing up. This issue builds both marketing pages.

Background

• Footer links to About and FAQ — both return 404
• ByteChain Academy: open-source Web3 learning platform, part of Nexacore Org, MIT licensed
• Community: Telegram https://t.me/ByteChainAcademy, GitHub https://github.com/Nexacore-Org/ByteChain-Academy, Email contact@nexacore.org

Implementation Guide

Create frontend/app/(marketing)/about/page.tsx with sections: mission statement ("Bite-sized Web3 education for busy professionals"), platform features overview, open source section with GitHub contribution info, and Nexacore Org contact section.

Create frontend/app/(marketing)/faq/page.tsx with accordion-style FAQ covering at minimum: "Is ByteChain Academy free?", "What is DAO governance?", "How do I earn certificates?", "What is a Stellar wallet and why do I need one?", "How do learning streaks work?", "How can I contribute?", "What is the Drips Wave Program?". Use Tailwind details/summary elements or simple useState toggle for accordion.

Acceptance Criteria

• /about page renders with mission, features, open source, and contact sections
• /faq page renders with at least 7 FAQ items in accordion style
• Both pages match the dark theme
• GitHub and Telegram links correct and open in new tab
• Footer links to both pages work correctly
• Both pages mobile responsive

Complexity: High - 200 points
Join: https://t.me/ByteChainAcademy | Contact: contact@nexacore.org