bidi-js: Unicode Bidirectional Algorithm

The `bidi-js` package provides a pure JavaScript implementation of the Unicode Bidirectional Algorithm (UAX #9) version 13.0.0. It aims for correctness, small bundle size, and performance, having passed all Unicode conformance tests. Currently at version 1.0.3, it offers a stable API for calculating embedding levels, reordering segments, and identifying mirrored characters in mixed-direction text. It ships as ES5 compatible and has no external dependencies, making it suitable for both browser and Node.js environments. The library differentiates itself by providing a factory function for module initialization, allowing for flexible deployment, such as within web workers, and ensuring a self-contained module without closure dependencies.