Styled-is Flag Utility for styled-components

styled-is is a utility library designed to simplify conditional styling within `styled-components` by providing declarative functions for checking component props. It offers functions like `is`, `isNot`, `isOr`, and `isSomeNot` for boolean prop checks, as well as `match` for value-based prop comparisons. The current stable version, 1.3.0, indicates a mature and stable project focused on a specific use case within the `styled-components` ecosystem. The library aims to enable cleaner and more readable style definitions, reducing the need for verbose ternary operators or complex prop destructuring directly within styled templates. It ships with TypeScript types, enhancing the developer experience in TypeScript projects by providing strong type checking and IDE autocompletion.