v0.0.4 of fluid_motions

A declarative, physics-based fluid animation and gesture package for Flutter, inspired by Framer Motion. Changelog excerpt: - Feature: Introduced the new Extension API (.fluidInteractable()and .fluidDraggable()) for cleaner, declarative widget wrapping without manual state management. - Documentation: Major README overhaul for a more professional presentation, detailing all core features and usage examples. - NEW EXAMPLE APP: Added a comprehensive example app to demonstrate the features of Fluid Motions.