Package branding-simply-linux: Information

- alterator: Add logo_width.png.
- alterator: Add logo_48.png.
- components.mk: Don't resize installer background.
- components.mk: Don't try to install non-existent backgrounds.
- backgrounds: Drop SL-10 backgrounds.
- graphics: Drop desktop_*.png symlinks.
- bootloader: White grub help string.
- alterator: Fix images file mode.
- alterator: Migrate to Qt6.
- slideshow: No e2k slide for SL-11.
- slideshow: Update for SL-11.
- images/: Drop background*.png.
- alterator: Update installer background.
- xfce-settings: Explicitly set default SL background.
- graphics: Update lightdm wallpaper.
- bootloader: Update grub background for SL-11.
- xfce-settings: Update xfconf configs for Xfce-4.20.
- xfce-settings: Set SL background for Xfce-4.20.
- indexhtml: Update "Software Repository" link.
- indexhtml: Use English page for "Software Repository" link.
- indexhtml: Fix links.
- bootloader: Drop gfxboot leftovers (closes: #51344).

- menu: Drop org.gnome.Shotwell.desktop.
- menu: Update desktop files.
- release: Set codename to Giuseppe.
- bootsplash: Update plymouth theme if needed.
- build: Replace convert with magick.
- bootsplash: Use bgrt-alt plymouth theme.
- xfce-settings: Increase panel size.
- all: Set status to alpha.
- bootloader: Drop gfxboot support.

- E2K: replace slide 10