RTLCSS: LTR to RTL CSS Transformer

RTLCSS is a robust framework for transforming Left-To-Right (LTR) Cascading Style Sheets (CSS) into Right-To-Left (RTL) stylesheets. It enables developers to internationalize web interfaces for RTL languages with minimal manual effort by automatically flipping directional properties (e.g., `left` to `right`, `margin-left` to `margin-right`). The current stable version is 4.3.0, with a focus on stability and compatibility. It operates as a PostCSS plugin, leveraging PostCSS's AST manipulation capabilities, and supports various control directives and a plugin architecture for custom transformations. Key differentiators include its extensive directive support for fine-grained control over transformations, a flexible plugin API, and a clear upgrade path across major versions, primarily driven by PostCSS updates.