- Added a new data structure `ScheduleChanges` to represent changes when a university document is republished.
- Implemented methods to read and write changes to a local JSON file.
- Enhanced the `Repository` class to detect changes between the current and fresh timetable versions.
- Updated the `MainViewModel` to expose changes to the UI and handle marking changes as seen.
- Created UI components for displaying changes in both Home and Settings screens.
- Added support for changes in iOS views, including a new `ChangesCard` and `ChangesSheet`.
- Implemented logic to compare timetable versions and identify added, removed, and changed lessons.
- Introduced `Dates.swift` for handling date and time in the university's timezone.
- Created `Models.swift` to define data structures for timetable, lessons, and directory search results.
- Implemented `Schedule.swift` for managing lesson slots and timetable functionalities.
- Developed `Storage.swift` for user settings and data persistence.
- Added `Widgets.swift` to create widgets displaying lessons and upcoming classes.
