v0.1.0 of mervey_ui_kit

Adaptive Material/Cupertino design system: theming tokens, semantic color palette and reusable widgets that pick the right backend per platform. Changelog excerpt: Initial release. - Requires Dart >= 3.6.0and Flutter >= 3.27.0(uses Color.withValues(alpha:)). - Adaptive Material/Cupertino theming entry point (AppTheme.light, AppTheme.dark) with optional palette, typographyand iconsoverrides. - Semantic color palette (AppColorPalette) with .light()/ .dark()factories and neutral Material defaults; brand overrides via named parameters. toColorSchemefills the Material 3 surface-container ramp, outline/ outlineVariantand `surfaceTint[...]