Replay Support for Desktop (Windows/Linux/macOS)

### Description

Currently the Flutter replay support depends on native support provided by the cocoa SDK (iOS) and java SDK (android). We could, fairly easily, add macOS support with the cocoa SDK. Doing the Windows & Linux would require adding support for native replay capture to a native SDK (sentry-native).
There is no ongoing development in this area but this issue should serve to track future progress and also to gauge interest in this functionality.