October Prebuild (#15325)

* Add october background

* Add armoire

* Add subscriber gear

* add new pet

* improve quest tests

* Fixes from gear switchup

* use new sprite system for quest images

* fixes

* fix quest image alignment

* add missing string

* fix(style): lint warnings and typo

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Co-authored-by: Phillip Thelen <phillip@habitica.com>
Co-authored-by: Sabe Jones <sabe@habitica.com>

website/common/script/content/appearance/backgrounds.js

@@ -632,6 +632,9 @@ const backgrounds = {
   backgrounds092024: {
     magic_door_in_forest: { },
   },
+  backgrounds102024: {
+    surrounded_by_ghosts: { },
+  },
   eventBackgrounds: {
     birthday_bash: {
       price: 0,