v0.1.0 of face_overlay

Real-time AR face overlay for Flutter. Uses CameraX (Android) and AVFoundation (iOS) with Google MediaPipe Face Landmarker to detect 478 facial landmarks and render any PNG image as an overlay on dete [...] Changelog excerpt: Initial release of face_overlay. ### Face detection - Integrated Google MediaPipe Face Landmarker(478-point model, LIVE_STREAMmode) for real-time face detection on Android and iOS. - Supports detecting up to N faces simultaneously, configurable via FaceOverlayConfig.maxFaces. - Exposes minFaceDetectionConfidence, minFacePresenceConfidence, and minTrackingConfidencethresholds for tuning detection sensitivity. - Landmark data is streamed from native to Flutter per frame via `Even[...]