Fix next day arrivals

[0.8.2]

Fixed

• Arrivals on next day are correctly reflected again. Stopped working with the same OpenAI model.

Fix show stopping file read/write errors

[0.8.1]

Fixed

• Error with reading and saving files.

Core functionality release.

[0.8.0]

Added

• Main functionality to extract schedule information using gpt 3.5 turbo.
• Serialize to .ics format.
• CLI