New features
- Added fully customizable theme; it's now truly Material You.

Changes
- Transitioned to GPL-3.0 license.
- Refreshed sponsors screen to use Material 3 Expressive.
- Updated daily goals form behavior. Nutrient goals have been reset to default values (sorry for the inconvenience).

Bug fixes
- Fixed unexpected meal reordering after editing a meal.
- Fixed button contrast issues on the food search screen.
