**refactor: consolidate folder structure and improve compatibility**

### Changes:
- **rollup.config.js**:
  - Merged and reformatted `nodeBuiltins` definition for cleaner code.
  - Updated `input` path from `examples/browser_compatible_exports.ts` to `demo/browser_compatible_exports.ts`.
  - Reformatted `replace` plugin configuration for better readability.

- **.github/workflows/deploy-demo.yml**:
  - Updated deployment folder from `examples` to `demo`.

- **Renamed**:
  - `examples/browser_compatible_exports.ts` → `demo/browser_compatible_exports.ts`.

- **scripts/generate-version.js**:
  - Removed unnecessary semicolons for consistent formatting.

### Purpose:
Aligned folder structure by migrating from `examples` to `demo` for uniformity and better organization. Improved code readability and formatting across configurations and scripts.

examples/browser_compatible_exports.ts

@@ -1,69 +0,0 @@
-// Import and provide Buffer polyfill for browser environment
-import { Buffer } from 'buffer'
-// Make Buffer available globally
-globalThis.Buffer = Buffer
-
-// Explicitly avoid importing Node.js modules like 'fs' and 'util'
-// by using a dynamic import with a shim for Node.js modules
-if (typeof window !== 'undefined') {
-  // Browser environment - create empty shims for Node.js modules
-  // Add missing properties to match the Node.js Require interface
-  const browserRequire = function(module: string) {
-    if (module === 'fs' || module === 'util' || module === 'path') {
-      console.warn(`Module '${module}' is not available in browser environments.`)
-      return {}
-    }
-    throw new Error(`Cannot require module '${module}' in browser environment.`)
-  }
-
-  // Add the missing properties from the Node.js Require interface
-  browserRequire.cache = {}
-  browserRequire.extensions = {}
-  browserRequire.main = { exports: {} }
-  browserRequire.resolve = (id: string) => id
-
-  // Assign to window
-  window.require = browserRequire as any
-}
-
-// Export only browser-compatible parts
-export { BrainyData } from '../src/brainyData.js'
-export type { BrainyDataConfig } from '../src/brainyData.js'
-export { NounType, VerbType } from '../src/types/graphTypes.js'
-export type { GraphNoun } from '../src/types/graphTypes.js'
-
-// Export core types
-export type {
-  Vector,
-  VectorDocument,
-  SearchResult,
-  DistanceFunction,
-  EmbeddingFunction,
-  HNSWConfig,
-  StorageAdapter
-} from '../src/coreTypes.js'
-
-// Export distance functions for convenience
-export {
-  euclideanDistance,
-  cosineDistance,
-  manhattanDistance,
-  dotProductDistance
-} from '../src/utils/index.js'
-
-// Export embedding functionality
-export {
-  UniversalSentenceEncoder,
-  createEmbeddingFunction,
-  createTensorFlowEmbeddingFunction,
-  defaultEmbeddingFunction
-} from '../src/utils/embedding.js'
-
-// Export storage adapters (only browser-compatible ones)
-export {
-  OPFSStorage,
-  MemoryStorage,
-  createStorage
-} from '../src/storage/opfsStorage.js'
-
-// Note: Exclude CLI and Node.js specific parts