Add a purpose-drawn icon (indigo/violet badge with an orchestration hub-and-spoke
glyph) as .svg, a 256px .png, and a multi-resolution .ico (16-256). versioninfo.json
drives goversioninfo to embed the icon + metadata into the Windows binaries; the
generated .syso objects are build artifacts and gitignored.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>