Package branding-simply-linux: Information

- system-settings: Set ligthdm gtk theme to Orchis-Light.
- xfce-settings,system-settings: Change icon theme to Papirus-Light
  (closes: #56792).
- xfce-settings: Require icon-theme-Papirus-{Light,Dark}.
- menu: Add 'PulseAudio' to pavucontrol GenericName (closes: #56591).
- alterator: Use black font color.
- notes: Update English release-notes.
- notes: Clarification that reboot will occur automatically.
- graphics,system-settings: Use slinux-margin.svg in lightdm.
- xfce-settings: Set mugshot as command-profile in the menu.
- alterator: Update installer background color.
- graphics: Add distro-logo.
- xfce-settings: Enable event sounds by default (closes: #56770).
- xfce-settings: Set menu background opacity to 0.
- xfce-settings: Use xfce4-popup-whiskermenu.
- xfce-settings: Update xfce4-keyboard-shortcuts.xml from libxfce4ui.
- os-release.in: Fix typo (closes: #56584).
- xfce-settings: Enable show_frame_shadow by default (closes: #56791).
- xfce-settings: Disable scroll_workspaces option by default.

- os-release.in: Add VARIANT and VARIANT_ID.
- alterator: Use no_image.svg as installer step icons.
- alterator: Update logo_width.png.
- system-settings: Add conflict with all branding-*-mate-settings.
- system-settings: Use polkit-rule-nm-modify-system.
- os-release.in: Add DOCUMENTATION_URL and SUPPORT_URL.
- os-release.in: Add LOGO.
- os-release.in: Add ALT_BRANCH_ID.
- graphics: Add new system-logo.png (closes: #55976).
- images: Drop old unused logo.png.
- indexhtml: Fix some links.
- release: Remove duplicate space in altlinux-release.
- menu: Add 'PulseAudio' to Name of pavucontrol desktop file.
- xfce-settings: Fix description in Thunar/uca.xml.
- xfce-settings: Replace mate-search-tool with catfish.
- xfce4-settings: Set pwvucontrol as mixer command.
- menu: Add pwvucontrol desktop file.
- xfce-settings: Add power-profiles-daemon settings.

- spec: use claws-mail as mail reader on e2k (by Michael Shigorin).
- alterator: Change installer background color.
- menu: Add hardinfo2.desktop.