v0.2 release

Updates: 

NEW — Auto-Copy Reference to Canvas !

• File > Import Palette support for GIMP .gpl palette files, loading up to 16 colors for compatibility with GIMP, Aseprite,  Lospec, PixelChroma.
• Imported palettes automatically open in the Palette window.
• Unused palette swatches now remain truly empty instead of behaving like dark-gray colors.
• New reference-image Copy button converts the currently visible pan-and-zoom framing into pixel art.
• Each canvas cell uses the dominant color from its corresponding reference-image region.
• Converted reference images are applied to the active layer and can be reverted with a single Undo.
• Transparent and out-of-frame reference areas remain transparent on the canvas.
• Expanded automated coverage for palette imports, reference-image conversion, transparency, animation, Undo, and version metadata.
• Centralized application version metadata and improved versioned Windows release packaging.