Changed the "main" attribute from "index.js" to "lib.js" and added "module" and "exports" fields for compatibility with both import and require statements. Also incremented the version from 1.0.3 to 1.0.4.
Introduced the `NestedManifoldRegion` class to enable embedding of `WorkflowFunctionManifold` inside regions, allowing hierarchical workflows. Updated `bin.js` to demonstrate the new functionality and adjusted `lib.js` for nested region navigation and execution logic. Updated `package.json` to specify "type": "module" for ES module support.
Updated project name and description in package.json for clearer purpose. Enhanced README with a detailed table of contents and error handling section. Improved error handling in index.js with comprehensive logging for various failure scenarios.
