fix: update all imports and references from BrainyData to Brainy

- Fixed imports in examples/tests/ to use correct Brainy import
- Fixed imports in tests/benchmarks/ to use correct paths
- Updated bin/brainy-interactive.js to use Brainy instead of BrainyData
- Corrected documentation references throughout codebase
- Removed duplicate imports in benchmark files
- All files now consistently use 'Brainy' class from dist/index.js

examples/tests/test-simple.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-import { BrainyData } from './dist/index.js'
+import { Brainy } from './dist/index.js'
 
 async function testBasicFunctionality() {
   console.log('Testing Brainy 2.0 Core Functionality...\n')
@@ -9,7 +9,7 @@ async function testBasicFunctionality() {
   try {
     // Test 1: Initialization
     console.log('1. Testing initialization...')
-    brain = new BrainyData({
+    brain = new Brainy({
       storage: { forceMemoryStorage: true },
       dimensions: 384,
       metric: 'cosine'