FCE-2487: Override MediaStream

[anna1901]

Description

Override types related to MediaStream to include MediaStream from RN.

Documentation impact

• Documentation update required
• Documentation updated in another PR
• No documentation update required

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)

[linear]

FCE-2487 Overwrite Track to include MediaStream from react-native-webrtc

[Copilot]

Pull request overview

This PR overrides TypeScript type definitions for MediaStream-related types in the mobile client to use the React Native WebRTC MediaStream type instead of the standard web MediaStream type. This fixes type inconsistencies where the mobile client was using MediaStreamWithURL interface workarounds.

Changes:

• Overrides return types of hooks (useCamera, useMicrophone, useLivestreamViewer, useLivestreamStreamer, usePeers) to use RNMediaStream
• Redefines types (Track, PeerWithTracks, StreamerInputs, ConnectStreamerConfig, UseLivestreamViewerResult) to use RNMediaStream
• Removes MediaStreamWithURL interface workarounds from example files
• Adds entry point configuration to video-player example app

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/mobile-client/src/index.ts	Overrides hook return types and redefines types to use React Native MediaStream instead of web MediaStream
examples/mobile-client/video-player/package.json	Adds main entry point configuration
examples/mobile-client/video-player/index.js	Creates entry point file that registers the root component
examples/mobile-client/video-player/app.json	Adds main entry point to Expo configuration
examples/mobile-client/video-player/components/FishjamPlayerViewer.tsx	Removes MediaStreamWithURL workaround, uses proper types
examples/mobile-client/video-player/components/FishjamPlayerStreamer.tsx	Removes MediaStreamWithURL workaround, uses proper types
examples/mobile-client/minimal-react-native/components/VideosGridItem.tsx	Removes MediaStreamWithURL workaround, removes TODOs, adds mirror prop
examples/mobile-client/fishjam-chat/components/VideosGrid.tsx	Removes MediaStreamWithURL workaround, adds mirror prop
examples/mobile-client/fishjam-chat/app/room/preview.tsx	Removes MediaStreamWithURL workaround, removes unused videoRoomEnv parameter
examples/mobile-client/fishjam-chat/app/livestream/viewer.tsx	Adds mirror prop to RTCView
examples/mobile-client/fishjam-chat/app/livestream/streamer.tsx	Removes MediaStreamWithURL workaround
examples/mobile-client/fishjam-chat/app/(tabs)/room.tsx	Removes videoRoomEnv from navigation params

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