**feat: add browser-compatible build configuration and environment detection**

### Changes:
- Added `rollup.unified.js` for building a unified bundle with environment detection (Node.js, Browser, Serverless).
- Added `rollup_config.js` for browser-specific bundle configurations.
- Created `tsconfig.browser.json` for browser builds and `tsconfig.unified.json` for unified builds.
- Implemented custom Rollup plugins:
  - **`fixThisReferences`**: Resolves `this` reference issues in TensorFlow files.
  - **`nodeModuleShims`**: Provides empty shims for Node.js built-in modules in browser environments.
- Updated dependencies in `package-lock.json` to include Rollup plugins and updated `buffer` dependency for polyfills.
- Created `src/unified.ts` as the unified library entry point with dynamic environment detection.

### Purpose:
- Introduced a unified and browser-compatible build pipeline to ensure `Brainy` can seamlessly operate across multiple environments (Node.js, Browser, Serverless).
- Resolved compatibility issues with Node.js modules and specific library builds.
- Enhanced flexibility and usability for developers working in diverse runtime environments.

src/index.ts

@@ -26,20 +26,16 @@ export {
 
 // Export embedding functionality
 import {
-  SimpleEmbedding,
   UniversalSentenceEncoder,
   createEmbeddingFunction,
   createTensorFlowEmbeddingFunction,
-  createSimpleEmbeddingFunction,
   defaultEmbeddingFunction
 } from './utils/embedding.js'
 
 export {
-  SimpleEmbedding,
   UniversalSentenceEncoder,
   createEmbeddingFunction,
   createTensorFlowEmbeddingFunction,
-  createSimpleEmbeddingFunction,
   defaultEmbeddingFunction
 }
 
@@ -141,12 +137,8 @@ import {
   ServerSearchActivationAugmentation,
   createServerSearchAugmentations
 } from './augmentations/serverSearchAugmentations.js'
-import {
-  LLMCognitionAugmentation,
-  LLMActivationAugmentation,
-  createLLMAugmentations
-} from './augmentations/llmAugmentations.js'
 
+// Non-LLM exports
 export {
   MemoryStorageAugmentation,
   FileSystemStorageAugmentation,
@@ -157,12 +149,13 @@ export {
   createConduitAugmentation,
   ServerSearchConduitAugmentation,
   ServerSearchActivationAugmentation,
-  createServerSearchAugmentations,
-  LLMCognitionAugmentation,
-  LLMActivationAugmentation,
-  createLLMAugmentations
+  createServerSearchAugmentations
 }
 
+// LLM augmentations are optional and not imported by default
+// They can be imported directly from their module if needed:
+// import { LLMCognitionAugmentation, LLMActivationAugmentation, createLLMAugmentations } from './augmentations/llmAugmentations.js'
+
 
 // Export types
 import type {
@@ -178,6 +171,15 @@ import type {
   StorageAdapter
 } from './coreTypes.js'
 
+// Export HNSW index and optimized version
+import { HNSWIndex } from './hnsw/hnswIndex.js'
+import { HNSWIndexOptimized, HNSWOptimizedConfig } from './hnsw/hnswIndexOptimized.js'
+
+export {
+  HNSWIndex,
+  HNSWIndexOptimized
+}
+
 export type {
   Vector,
   VectorDocument,
@@ -188,6 +190,7 @@ export type {
   HNSWNoun,
   GraphVerb,
   HNSWConfig,
+  HNSWOptimizedConfig,
   StorageAdapter
 }
 

src/unified.ts

@@ -0,0 +1,21 @@
+/**
+ * Unified entry point for Brainy
+ * This file exports everything from index.ts and adds environment detection
+ * to ensure the library works in any environment (Node.js, browser, serverless)
+ */
+
+// Environment detection (will be replaced by the build process)
+const isBrowser = typeof window !== 'undefined'
+const isNode =
+  typeof process !== 'undefined' && process.versions && process.versions.node
+const isServerless = !isBrowser && !isNode
+
+// Export environment information
+export const environment = {
+  isBrowser,
+  isNode,
+  isServerless
+}
+
+// Re-export everything from index.ts
+export * from './index.js'