v0.1.0 of facecore

Self-contained Flutter plugin for camera-based face liveness, depth, and anti-spoof checks before capturing a photo on Android and iOS. Changelog excerpt: - Initial public release. - Native liveness capture flow on Android (CameraX + ML Kit Face Detection) and iOS (AVFoundation + Vision). - Configurable liveness actions: blink, turn left, turn right. - Optional depth-based anti-spoof check. - Returns a FaceCaptureResultwith the captured JPEG path, dimensions, motion standard deviation, and depth range.