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/eggs.js

@@ -417,6 +417,12 @@ const quests = {
     adjective: t('questEggRaccoonAdjective'),
     canBuy: hasQuestAchievementFunction('raccoon'),
   },
+  Dog: {
+    text: t('questEggDogText'),
+    mountText: t('questEggDogMountText'),
+    adjective: t('questEggDogAdjective'),
+    canBuy: hasQuestAchievementFunction('dog'),
+  },
 };
 
 applyEggDefaults(drops, {