AssertionError for Test Frameworks

The `assertion-error` package provides standardized `AssertionError` and `AssertionResult` classes, primarily designed for JavaScript and TypeScript test and validation frameworks. As of its current stable version `2.0.1`, it offers a robust way to represent both assertion failures and successes within a consistent `Result` interface. The library maintains a steady, though not rapid, release cadence, with significant updates like the `v2.0.0` rewrite to modern TypeScript and ES6 classes. A key differentiator is the inclusion of `AssertionResult`, which allows functions to explicitly return successful assertion outcomes alongside `AssertionError` for failures, both implementing a common `Result` interface with an `.ok` boolean property. This design streamlines error handling and result checking in testing utilities, providing a more structured approach than relying solely on exceptions. It supports both Node.js and Deno environments.