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.
