Allow customizing the screensaver logo (#863)

* check for custom screensaver logo or fall back to default

* move logo location to omarchy config folder

* fix missed location check

* add menu item to copy logo.txt and open in editor

* move to setup menu

* Just always use a user-editable screensaver.txt file

* No longer needed

* Be clearer

---------

Co-authored-by: Christopher Moore <cmoore@yozu.co.uk>
Co-authored-by: David Heinemeier Hansson <david@hey.com>

bin/omarchy-cmd-screensaver

@@ -3,7 +3,7 @@
 if command -v tte &>/dev/null; then
   while true; do
     effect=$(tte 2>&1 | grep -oP '{\K[^}]+' | tr ',' ' ' | tr ' ' '\n' | sed -n '/^beams$/,$p' | sort -u | shuf -n1)
-    tte -i ~/.local/share/omarchy/logo.txt \
+    tte -i ~/.config/omarchy/screensaver.txt \
       --frame-rate 240 --canvas-width 0 --canvas-height $(($(tput lines) - 2)) --anchor-canvas c --anchor-text c \
       "$effect" &