Update README.md

fix: downgrade vite to v5 - v8 breaks production build

fix: add separate desktop files for deb and AppImage

fix: use correct desktop files for deb and AppImage separately

fix: use correct Exec path in desktop file - was Exec=ATK should be E…

…xec=/opt/atk/ATK

fix: correct Exec path and Categories in desktop file

fix: use committed appicon in CI instead of generating placeholder

fix: replace broken appicon with proper 256x256 PNG

fix: deb package - icon registration and app launcher entry

feat: add ATK logo - terminal wireframe aesthetic