feat: add node: protocol to all Node.js built-in imports for bundler compatibility

- Updated all fs, path, crypto, os, url, util, events, http, https, net, child_process, stream, and zlib imports
- Changed both static imports and dynamic imports to use node: protocol
- This makes Brainy more bundler-friendly by explicitly marking Node.js built-ins
- Prevents bundlers from attempting to polyfill or bundle these modules
- Reduces bundle size for web applications using Brainy
- Improves tree-shaking and dead code elimination

Benefits for external bundlers:
- Clear distinction between Node.js built-ins and external dependencies
- No ambiguity about what needs polyfilling
- Smaller bundles for browser builds
- Better compatibility with modern bundlers (Webpack 5, Vite, Rollup, esbuild)

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

src/distributed/networkTransport.ts

@@ -3,8 +3,8 @@
  * Uses WebSocket + HTTP for maximum compatibility
  */
 
-import * as http from 'http'
-import { EventEmitter } from 'events'
+import * as http from 'node:http'
+import { EventEmitter } from 'node:events'
 import { WebSocket } from 'ws'
 
 // Use dynamic imports for Node.js specific modules
@@ -378,7 +378,7 @@ export class NetworkTransport extends EventEmitter {
     
     try {
       // Query Kubernetes API for pod endpoints
-      const https = await import('https')
+      const https = await import('node:https')
       const response = await new Promise<any>((resolve, reject) => {
         https.get(
           `${apiServer}/api/v1/namespaces/${namespace}/endpoints/${serviceName}`,