**feat(tests): add tests for TextEncoder, TensorFlow.js, and fallback mechanisms**

- Introduced `test-fallback-function.js` and `test-fallback-simple.js` to validate `executeInThread` fallback functionality with both named and anonymous compute-intensive functions.
- Added `test-tensorflow-textencoder.js` for TensorFlow.js and TextEncoder tests in a Node.js environment.
- Created `test-tensorflow-textencoder.html` for browser-based TensorFlow.js and TextEncoder tests.
- Implemented cross-environment test support in `cli-package/src/test-tensorflow-textencoder.ts` for CLI functionality.
- Enhanced `src/utils/embedding.ts`, `textEncoding.ts`, and `brainy-wrapper.js` to include updated global `TextEncoder` and `TextDecoder` utilities for compatibility and worker improvements.
- Standardized and expanded utility methods in `PlatformNode` for broader support, including `isFloat32Array` and `isTypedArray` checks.
- Updated Node.js requirement to `>= 24.4.0` across documentation and configuration files for compatibility improvements.

This update introduces comprehensive testing for fallback mechanisms, TensorFlow.js, and TextEncoder across multiple environments, ensuring robustness and compatibility.

src/utils/environment.ts

@@ -60,7 +60,7 @@ export async function areWorkerThreadsAvailable(): Promise<boolean> {
 export function areWorkerThreadsAvailableSync(): boolean {
   if (!isNode()) return false
 
-  // In Node.js 24.3.0+, worker_threads is always available
+  // In Node.js 24.4.0+, worker_threads is always available
   return parseInt(process.versions.node.split('.')[0]) >= 24
 }