Release v2.1 - IO26 Schedule & iOS26 support

[dzenbot]

IO26 schedule:

• Displaying a 4th tab for IO26, days prior and days after IO. After that, it is no longer visible
• Fetching the IO26 schedule via a temporary endpoint, generated by a Google sheet app
• Displaying the IO26 daily schedule
• Allowing to fav specific schedule activities, persist locally and build a customized schedule
• Notifying the user 2 hours prior the activity's start time (local notifications)
• Un-faving an activity deletes the scheduled local notification
• Tapping the local notification opens the app and show the activity, in that specific day
• Displaying all local notifications in the notifications section (with push notifications)

iOS26 support:

• UI overhaul to adjust to iOS26's latest liquid glass design paradigm
• Making it backwards compatible with previous OS' design

Series support:

• Displaying the series a race belongs to, in the race detail view