chore: migrate omarchy state from ~/.config to ~/.local/state

Move all omarchy runtime state (themes, backgrounds, current theme)
from ~/.config/omarchy/current to ~/.local/state/omarchy/current
to keep the config dir free of generated files. Add mise task for
recreating symlinks and update credential helpers for tea.

script/omarchy-theme-set-keyboard-f16

@@ -3,7 +3,7 @@
 # omarchy:summary=Apply the current theme keyboard color to Framework Laptop 16 keyboards
 # omarchy:hidden=true
 
-FRAMEWORK16_THEME=~/.config/omarchy/current/theme/keyboard.rgb
+FRAMEWORK16_THEME=~/.local/state/omarchy/current/theme/keyboard.rgb
 
 if omarchy-cmd-present qmk_hid && [[ -f $FRAMEWORK16_THEME ]]; then
   hex=$(cat "$FRAMEWORK16_THEME")