[medvednikov]

Summary

• add a new image vlib module with Go-style Point, Rectangle, uniform images, packed pixel buffers, paletted images, and Y'CbCr buffers
• add image.color with standard color structs, model conversion, palette lookup, Y'CbCr conversion, and CMYK conversion
• port Go's image format registration/sniff/decode hooks to V io.Reader via register_format, decode, and decode_config
• translate the core Go image/color tests for geometry invariants, color conversion arithmetic, buffer layout, sub-images, RGBA64 equivalence, and format registration
• document current scope and add Go BSD attribution for derived code

Scope

This ports the core Go image/image.color behavior into V-style APIs. Format-specific codec packages such as PNG, JPEG, and GIF are intentionally left out for follow-up PRs, but the registration hooks needed by such packages are included.

Tests

• ./vnew -silent test vlib/image/
• ./vnew check-md vlib/image/README.md

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Return false for empty palettes in opaque

When a non-empty Paletted image has an empty palette, at() reports every in-bounds pixel as color.transparent, but opaque() skips the palette loop and reaches this true, so callers can treat a fully transparent image as fully opaque. Add an empty-palette check (or otherwise align opaque() with at()'s empty-palette behavior) before this return.

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