v0.2.0 of cxorbi_flutter

Cxorbi analytics for Flutter: session replay, heatmaps, screens, gestures, funnels, performance and error capture for iOS and Android. Changelog excerpt: - Added source-scoped one-token onboarding with StartConfig.withDatasourceId(). - Decoupled always-retained screen analytics, heatmap layouts, and interactions from sampled full replay frames. - Added backend-authoritative deterministic replay decisions and typed capture policy bootstrap. - Added full-session and current-screen Event-Triggered Replay APIs with pre-trigger candidate retention. - Added source/screen-instance attribution, candidate queue expiry and replay queue prioritization. - [...]