feat: Podcast Generator Application

[ggalloro]

Description

This PR implements the Podcast Generator application, a Next.js app that converts RSS feeds into personalized audio podcasts using AI.

Key Features

• Feed Management: Add/Remove RSS feeds.
• AI Summarization: Uses Gemini 2.5 Flash to summarize articles.
• Text-to-Speech: Uses Google Cloud TTS for audio generation.
• Audio Merging: Compiles segments into a single MP3.
• Playback: Integrated audio player.

Architecture

• Frontend: Next.js, Tailwind CSS
• Backend: Next.js API Routes
• Storage: Local JSON files (MVP)

How to Test

1. Clone branch.
2. Set GOOGLE_API_KEY and GOOGLE_APPLICATION_CREDENTIALS.
3. Run npm run dev.
4. Add a feed and generate a podcast.

[github-actions]

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