ExtendedSplashScreen is not documented

[Youssef1313]

What would you like clarification on:

Concern?

• Usage in industry
• Clarification of capabilities
• Getting started with Uno
• Developing with Uno
• Contributing to the Uno project
• Publishing your application
• Support
• Other (please specify):

For which Platform:

• iOS
• Android
• WebAssembly
• Windows

Anything else we need to know?

[nickrandolph]

Docs for this will be on Toolkit. I think there's a basic doc that covers some aspects but a full walkthrough would be nice

[agneszitte]

@kazo0 / @nickrandolph / @pictos if you have additional info or comments on what is missing for the doc at the moment for the ExtendedSplashScreen please add them in the comment of this issue so anyone can pick up to adjust it

[HakanL]

It would be great to document how to do this in all platforms, for me it's not working in Skia (no logo), but I haven't spent much time troubleshooting it.

[kazo0]

@nickrandolph / @HakanL I see this doc but it's not included in the TOC so I will add it. But I think we'll need to expand it a bit with more explanation and examples eventually

[agneszitte]

@kazo0 I will let you check with @lukeblevins if he can give a hand to expand a bit with more explanation and examples.
As I also ping him on this other issue unoplatform/uno#13338 (comment), in case he can work on both.

[lukeblevins]

I see this doc ExtendedSplashScreen.md
I think we'll need to expand it a bit with more explanation and examples eventually

Working on this item (see context above from @kazo0 in #574 (comment))