Addresses inconsistent time formatting and lack of timezone
handling throughout the application by introducing a
`TimeFormatter` utility.
This class centralizes time formatting logic, providing
timezone conversion (defaults to Europe/Copenhagen) and
support for both 12-hour and 24-hour formats, configurable
via `CalendarConfig`.
It also updates event rendering to utilize the new
`TimeFormatter` for consistent time displays.
Introduces the ability to convert all-day events to timed events by dragging them out of the header.
Leverages a factory method to create timed events from all-day elements, ensuring proper data conversion and styling.
Improves user experience by allowing more flexible event scheduling.
Creates `SwpEventElement` and `SwpAllDayEventElement` classes for handling event rendering.
Refactors event creation logic in `EventRenderer` to utilize these classes, improving code organization and reusability.
Adds factory methods for creating event elements from `CalendarEvent` objects, simplifying event instantiation and data management.
