LaunchDarkly JavaScript SDK Common Components

This package (`launchdarkly-js-sdk-common`) serves as the foundational core for all client-side JavaScript-based LaunchDarkly SDKs, including the browser, React, client-side Node, and Electron SDKs. It provides the essential, platform-agnostic implementation components, such as the `initialize` function used to create the basic client object and shared TypeScript definitions. Crucially, application developers should not directly reference or import from this package; it is an internal dependency for other LaunchDarkly SDKs. The current stable version is 5.8.0, with minor releases occurring frequently, often monthly or bi-monthly, introducing new features and bug fixes to support broader LaunchDarkly platform capabilities. Its key differentiator is providing a consistent, shared codebase to reduce duplication and ensure behavioral parity across various JavaScript environments for the LaunchDarkly ecosystem.