Added new subscription function "Editor", subscribers can unlock editing and export functions.

Description: The GDSII Viewer is a powerful tool designed for viewing and analyzing GDSII files, commonly used in the semiconductor industry. It provides a user-friendly interface and advanced features to streamline the design process of integrated circuits. Features: High Precision Viewing: Examine GDSII files with exact detail. Layer Management: Easily manage and toggle between different layers. Zoom and Pan: Effortlessly zoom in and out or pan across your designs. Detailed Inspection Tools: Utilize tools for in-depth analysis. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/