refactor: channel details cleanup

[szuperaz]

🎯 Goal

A cleanup for channel details, the main focus is to make it easier for integrators to reuse the specific building blocks, the implementation details describes all changes in detail,

🛠 Implementation details

1. Add members button extracted to its own component
   Why? If an integrator wants a separate "list members screen" and want to add "add members" button to the screen, they can reuse <ChannelAddMembersButton > component. The default implementation opens the add member modal, but it's possible to provide onPress for custom navigation.

2. Move props from ChannelDetails / ChannelDetailsContextProvider to the relevant component-level
   Why? Having all props in a single place is comfortable when using the ChannelDetails component directly, but it's unintuitive when integrators mix and match the building blocks. Now, if someone uses ChannelDetails they can customize the building blocks by overriding them and setting the specific props.

3. All channel details related components rely on ChannelDetailsContext
   Why? Previously, the ChannelDetails component accepted its own channel prop, but if someone wanted to mix and match building blocks, they needed to use the ChannelDetailsContextProvider. This approach is simpler, because all components rely on the ChannelDetailsContextProvider not almost all.

4. Simplify contexts for channel edit and add members
   Why? The ChannelAddMembersContext and ChannelDetailsEditContext contain the notification provider too, so if an integrator is building their own screens, they have one less context to provide here.

5. Some spacing fixes

6. Fix modal padding on Android in edge-to-edge mode

🎨 UI Changes

No UI changes

🧪 Testing

☑️ Checklist

• I have signed the Stream CLA (required)
• PR targets the develop branch
• Documentation is updated
• New code is tested in main example apps, including all possible scenarios
  • SampleApp iOS and Android
  • Expo iOS and Android

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
js_bundle_size	1959 KB	1963 KB	+3624 B	🔴