feature(195): Add new screens on iOS

[enthuan]

Here they are!

Added SpeakerList screen and sponsor screen. I also modified the "about" screen to match the Android one.

Things to note:

• Navigation is not yet handled, so it's not possible to click on a speaker
• I still use Moko resources. Compose MP doesn't handle multi module projects yet.

[enthuan]

All good here 🥳

Venue, Speakers, About and Sponsors are now in Compose MP.

🔥 Supports ViewModels
🔥 Hybrid mode between Android Compose & Jetbrains Compose / SwiftUI & Jetbrains Compose
Still need to add navigation but it's going in the right direction.

I won't be able to work on it until Monday so feel free to merge if needed.