This pull request introduces several improvements to the dropdown component and its styling, focusing on enhanced alignment and positioning logic, better SCSS class management, and minor API updates. The main themes are improved dropdown positioning using CSS anchor positioning with intelligent fallbacks, SCSS class prefixing for consistency, and small API/documentation tweaks.

Dropdown positioning and alignment improvements:

• The dropdown component now uses CSS anchor positioning with a comprehensive fallback strategy, automatically adjusting its position based on available space and alignment preferences. This reduces the need for manual upward-opening logic and ensures better placement in various viewport scenarios.
• The deprecated openUpwardForShortViewport prop is now documented as obsolete, since positioning is handled automatically by CSS anchor positioning and fallbacks.
• The dropdown's computed styles now place props.style last, so user-supplied styles can override alignment-based positioning if needed.

SCSS and class naming improvements:

• The Storybook webpack config now automatically prefixes non-module SCSS class names with ls- (except for Ant Design classes), improving BEM-style consistency and avoiding class name collisions.
• The dropdown SCSS now uses flex-direction: column to better support scrollable inner content, replacing the previous overflow: auto approach.

API and typing updates:

• The DropdownTriggerProps interface now explicitly includes a children prop for clarity and better typing.
• The Dropdown export is now correctly typed with a static Trigger property for improved TypeScript compatibility and backward compatibility.