Add appimage-manager to Desktop integration section

Author: pvojnisek

README.md

@@ -100,6 +100,7 @@
 - [AppImage To Gnome](https://github.com/DejfCold/ATG) - Monitors and (de)installs AppImages from the Gnome desktop.
 - [gnome_appimage_installer](https://github.com/knork-fork/gnome_appimage_installer) - Somewhat a misnomer (AppImages don't need to be "installed"), creates a desktop file that follows the freedesktop.org spec for your AppImage files; written in bash.
 - [Gear lever](https://github.com/mijorus/gearlever/) - Integrates AppImages into the Gnome desktop by drag-and-drop onto the Gear lever application.
+- [appimage-manager](https://github.com/pvojnisek/appimage-manager) - Single-file Python CLI tool that scans for AppImages, extracts icons and metadata, generates .desktop launchers, and installs icons to the XDG hicolor theme. Supports version-aware symlinks, StartupWMClass for dock integration, and optional systemd file watcher.
 
 ### Updaters