Packaging: .desktop File, App Icon, Install Script (M2 #24)

[ddroid]

What to build

Create the packaging artifacts needed to install Ronin as a proper Linux desktop application:

• .desktop file: A freedesktop-compliant .desktop entry so Ronin appears in application launchers (GNOME, KDE, etc.) with the correct name, icon, and exec path.
• App icon: A polished app icon in multiple sizes (at minimum 48x48, 128x128, 256x256, scalable SVG) that matches Ronin's premium visual identity.
• Install script: A shell script or Makefile target that installs the binary, .desktop file, and icons to standard Linux paths.
• Shortcut docs: Documentation for how users can bind ronin --quick to a global keyboard shortcut in GNOME, KDE, and Sway.

Acceptance criteria

• .desktop file follows freedesktop specification
• .desktop file includes correct Exec, Icon, Name, Categories, and Comment fields
• App icon exists in multiple resolutions (48, 128, 256, SVG)
• App icon reflects Ronin's visual identity and looks good at all sizes
• Install script places binary, .desktop file, and icons in standard Linux paths
• After installation, Ronin appears in GNOME/KDE application launchers with icon
• Documentation covers binding ronin --quick to a shortcut in GNOME, KDE, and Sway
• Uninstall/clean target removes installed files
• Icon works with both light and dark desktop themes

Blocked by

• True Light/Dark/System Themes (M2 #1) #36 (True Light/Dark/System Themes)