Add animations

[danielchalmers]

add animations:

• hover/press animations for calendar days
• constant slightly shaky animations when focused on calendar day
• theme color transitions when switching theme in settings
• smooth animations when switching/loading pages or switching days etc
• smooth slide when changing sleep
• animations when moving elements/medications
• improve dialog/overlay/popover/snackbar transitions to be more like Material Design 3 Expressive
• improve smoothness and animation of import/export loading screen

[danielchalmers]

Moved to #67