Enhanced GUI with TEX Preview and Single File Extraction

Release 2.0.0

Enhanced GUI with TEX Preview and Single File Extraction

What's New

• TEX Preview in GUI: Enable the checkbox to preview .tex contents directly from .pkg files without extracting
• Single File Extraction: Double-click any file in the list to extract just that file
• Individual Texture Extraction: Extract specific textures from .tex files inside .pkg packages
• Dynamic File Counter: Total file count updates based on preview mode

Technical Documentation

• Added docs/pkg-format.md with complete .pkg file structure specification
• Added docs/tex-format.md with .tex container format, mipmap structure, and supported formats (PNG, JPG, BMP, RAW/RLE)