feat(triggershell): replace demo scripts with openrgb-hue apply

Drop the triggershell init scaffold scripts and add one script that
drives openrgb-hue apply: full option set as form fields, scene as a
103-entry dropdown, mapping defaulting to per-zone. The scene name
goes through a small wrapper since it's a positional CLI arg and
TriggerShell's passAs:arg can only emit --flag value pairs.

.gitignore

@@ -16,6 +16,9 @@
 !.zshenv
 !.hushlogin
 !arty.yml
+!triggershell.yml
+!scripts/
+!scripts/openrgb-hue-apply.sh
 !bin/
 !bin/arty
 !bin/stacks