feat: Podcast Generator Implementation

[ggalloro]

Summary

This PR implements the Podcast Generator application as defined in the Technical Specification.

Features

• RSS Feed Management: Add/Delete feeds.
• AI Summarization: Uses Google Gemini to summarize articles.
• Audio Generation: Uses TTS to convert summaries to audio.
• Podcast Stitching: Assembles intro, segments, and outro into an MP3 using FFmpeg.
• UI: Next.js App Router with Tailwind CSS components.

Architecture

• Frontend: React Server Components + Client Components.
• Backend: Next.js API Routes (/api/feeds, /api/generate, /api/podcasts).
• Database: SQLite with Prisma.

How to Test

1. Run npm install.
2. Set GEMINI_API_KEY in .env.
3. Run npx prisma migrate dev.
4. Run npm run dev.
5. Add an RSS feed and click "Generate Podcast".

[github-actions]

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