* add: seasonsl splash messages logic + scaffolding
* refactor: settin up and displaying splash messages.
They are now stored with their i18next keys and only get translated as soon as they are displayed. This also allows for better display of the `battlesWon` parameter which now supports better number formatting and the count is an interpolation
* fix: updateTitleStats not checking the namespace of battlesWon
* add tests for splash_messages
* test: always use UTC time
* fix: time-pattern to MM-DD
* fix splash_messages test
* add: const to control usage of seasonal splash messages
* fix tests (splashj)
* Update src/locales/ja/splash-messages.json
Co-authored-by: Chapybara-jp <charlie.beer@hotmail.com>
* Update src/locales/es/splash-messages.json
Add missing `number` format for battlesWon message
---------
Co-authored-by: Chapybara-jp <charlie.beer@hotmail.com>
* fix#762 by using slotIndex to add to party
for now the new pokemon was ALWAYS just pushed to the party array. Now it's put into the slot that was also previously selected as the mon to release
* add docs for `Pokemon.addToParty()`
* add simple tests for addToParty
* update `isBetween` docs. Remove `.js` imports
