Add Gempix2 - Nano Banana V2 Platform

## Summary
Adding Gempix2 as a platform to access Nano Banana V2 model.

## Description
Gempix2 is built on the **second-generation Nano Banana model**, providing:
- Free access to Nano Banana V2
- Web-based interface
- Text-to-image generation
- AI image editing
- No registration required

## Relevance
Since this repository showcases Nano Banana's capabilities, including a platform that makes the V2 model freely accessible to everyone would be valuable for users who want to try it themselves.

Thank you for considering!

Author: lizhen

README.md

@@ -27,6 +27,12 @@
 
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+
+## 🛠️ Tools & Platforms
+
+Access Nano Banana model through these platforms:
+- [Gempix2 (Nano Banana 2)](https://gempix2.site) - Free web platform using second-generation Nano Banana model for text-to-image generation, AI image editing, and video generation.
+
 ## 📰 News
 
 - **2025年9月24日：** 5️⃣ 第五次仓库更新