Update 0.6.7 - Improvements

Additions:
* Achievements now show their numerical progress
* Login sync. Creating an account or logging in will sync your saves to the cloud

Improvements:
* The chest achievement correctly triggers for unlocking multiple levels at once
* Major achievement refactoring

Fixes:
* Opening multiple chests counted as one for statistics, chores, and achievements
* Fixed active shop bot count
* Fixed constant loading overlay when inputting incorrect login credentials
* Handle additional network errors

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Happy Vacuuming!