**refactor(tests): consolidate and replace outdated environment test scripts**

- Removed obsolete scripts: `test-all-environments.js`, `test-fallback-function.js`, `test-fallback-simple.js`, `test-fix.js`, `test-tensorflow-textencoder.js`, `test-unified-encoding.js`, and `test-worker-utils.js`.
- Introduced `scripts/comprehensive-test.js` as a unified testing script covering all environments: Browser, Node.js, and CLI.
- Added `examples/cli-wrapper-example.js` to demonstrate a proper CLI implementation with TensorFlow.js initialization.

This refactor simplifies the testing structure by consolidating redundant scripts into a single comprehensive script while ensuring robust cross-environment coverage.

examples/cli-wrapper-example.js

@@ -0,0 +1,68 @@
+#!/usr/bin/env node
+
+/**
+ * Example CLI wrapper for Brainy that properly handles TensorFlow.js initialization
+ * 
+ * This example demonstrates how to create a CLI tool that uses Brainy
+ * while ensuring TensorFlow.js is properly initialized in Node.js environments.
+ * 
+ * Usage:
+ *   node cli-wrapper-example.js
+ */
+
+// CRITICAL: Apply the TensorFlow.js patch before any other imports
+// This prevents the "TextEncoder is not a constructor" error
+try {
+  // For CommonJS environments
+  if (typeof require === 'function') {
+    // First require the setup module to apply the patch
+    require('../dist/setup.js');
+    console.log('Applied TensorFlow.js patch via CommonJS require');
+  }
+} catch (error) {
+  console.warn('Failed to apply TensorFlow.js patch via require:', error);
+}
+
+// ES Modules approach - this will be used if the above fails or if using ES modules
+import('../dist/setup.js')
+  .then(() => {
+    console.log('Applied TensorFlow.js patch via ES modules import');
+    return import('../dist/unified.js');
+  })
+  .then((brainy) => {
+    // Now it's safe to use Brainy and TensorFlow.js
+    console.log('Brainy loaded successfully');
+    
+    // Example: Create a BrainyData instance
+    const db = new brainy.BrainyData({
+      name: 'cli-example',
+      storage: 'memory'
+    });
+    
+    // Example: Add some data
+    db.addItem('Hello world', { id: '1', metadata: { type: 'greeting' } })
+      .then(() => {
+        console.log('Added item to database');
+        
+        // Example: Search for similar items
+        return db.search('Hello', 1);
+      })
+      .then((results) => {
+        console.log('Search results:', results);
+        
+        // Clean up
+        return db.close();
+      })
+      .then(() => {
+        console.log('Database closed');
+        process.exit(0);
+      })
+      .catch((error) => {
+        console.error('Error in Brainy operations:', error);
+        process.exit(1);
+      });
+  })
+  .catch((error) => {
+    console.error('Failed to load Brainy:', error);
+    process.exit(1);
+  });