Add forjex.is-a.dev

Added domain information and project details for forjex.is-a.dev.

domains/forjex.is-a.dev.json

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+## Domain Information
+
+- **Domain name:** forjex.is-a.dev
+- **Target:** forjex.netlify.app
+
+## Project Details
+
+- **Project type:** Personal / educational equipment portfolio
+- **Description:** A showcase website for industrial teaching equipment and flow meter products
+- **Website preview:** https://forjex.netlify.app
+
+## Screenshots
+
+[请在这里上传一张网站首页截图]
+
+## Checklist
+
+- [x] I have read and followed the is-a.dev documentation
+- [x] I have verified that the target domain is working
+- [x] This project does not host any harmful or illegal content