December 2024 and Winter Wonderland 2025 build (#15358)

* feat(content): Winter 2025 build by @CuriousMagpie

* fix(content): add more WW

* fix(content): add more WW

* chore(subproj): update habitica-images

* fix(gala): December 2024 is Winter 2025

* fix(content): lint, background typo, 0 index month

* fix(content): add missing mystery set name

* fix(content): roll back erroneous month indexing

* fix(tests): no 13th month, consider releases in schedule test

* update gear strings

* fix(seasonal): show quest modal

* fix(seasonal): use category-item component

* chore(subproj): update habitica-images

---------

Co-authored-by: CuriousMagpie <eilatan@gmail.com>

website/common/script/content/gear/sets/mystery.js

@@ -67,6 +67,7 @@ const armor = {
   202401: { },
   202406: { },
   202407: { },
+  202412: { },
   301404: { },
   301703: { },
   301704: { },
@@ -232,6 +233,7 @@ const head = {
   202407: { },
   202409: { },
   202411: { },
+  202412: { },
   301404: { },
   301405: { },
   301703: { },