Background selector (#4519)

* UPDATE: select background method

* ADD: migration file for background selector

* Add symlink for background selector in walker-elephant.sh

Forgot about this file. Should be added to make sure the background selector feature available in the fresh install

* clean up the code a bit

Updated omarchy background selector to hide from provider list and removed subtext from entries.

* Make the background selector the default

* Fix migration

* FIX: typo on background symlink target

* UPDATE: add ~/.config/omarchy/backgrounds/theme.name

* UPDATE: Cache = false

* Fix escaping for all extensions

* Extract omarchy-theme-bg-set

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

bin/omarchy-theme-set

@@ -33,7 +33,7 @@ rm -rf "$CURRENT_THEME_PATH"
 mv "$NEXT_THEME_PATH" "$CURRENT_THEME_PATH"
 
 # Store theme name for reference
-echo "$THEME_NAME" > "$HOME/.config/omarchy/current/theme.name"
+echo "$THEME_NAME" >"$HOME/.config/omarchy/current/theme.name"
 
 # Change background with theme
 omarchy-theme-bg-next
@@ -48,6 +48,7 @@ omarchy-restart-hyprctl
 omarchy-restart-btop
 omarchy-restart-opencode
 omarchy-restart-mako
+omarchy-restart-walker
 
 # Change app-specific themes
 omarchy-theme-set-gnome