add-to-calendar and the ticketing

[durualayli]

• Fixed the UI of add to calendar and the ticketing button (if no link for ticketing is found, only shows the add to calendar button)
• When add to calendar is clicked, it first requests access to the calendar
• Adds the game with its name, location, and time to the Apple Calendar and opens Calendar, going to that specific date and time
• If a game was already added to the calendar, it displays a message saying the game was already added before
• After adding the game, it displays a message that the game was successfully added.

Next steps: Some of the endpoints for the ticketing links for the away games open the general athletics websites instead of the specific games, which is a detail that would be better if fixed in the future.

(I edited the video that's why the demo is like below)

Score.calendar.mp4