v1.0.0 of overlayer_ui_flutter

A premium, high-fidelity UI overlay controls library for Flutter, including customizable slider, toggle, dropdown, and button widgets. Changelog excerpt: - Initial release of overlayer_ui_flutter. - Includes premium, high-fidelity UI overlay widgets: - UIButton- Customizable, reactive interactive button. - UIToggle- Animated custom toggle switch with hollow/filled toggle and hover outlines. - UISlider- Slid-to-change controller featuring value indicators and hover support. - UIDropdown- Generic option selector with elastic toggle transition and follower list overlays. - Includes global overlay state management: - `OverlayerS[...]