Turn pkg and cmd functions into bins to avoid PATH issues in subshells

migrations/1751887718.sh

@@ -1,6 +1,6 @@
 echo "Install Impala as new wifi selection TUI"
 
-if cmd-missing impala; then
-  pkg-add impala
+if omarchy-cmd-missing impala; then
+  omarchy-pkg-add impala
   omarchy-refresh-waybar
 fi