- Move icon components (FileIcons, EditIcons, NavigationIcons, StatusIcons,
SpecialIcons, StopIcon) from vscode-ide-companion to webui package
- Migrate Tooltip component with CSS variable theming support
- Migrate WaitingMessage and InterruptedMessage components
- Enhance Button component with forwardRef, new variants (ghost, outline),
loading state, and icon support
- Enhance Input component with forwardRef, error state, label, and helper text
- Update vscode-ide-companion to import components from @qwen-code/webui
- Remove replaced local components from vscode-ide-companion
- Add skipLibCheck to vscode-ide-companion tsconfig for type compatibility
