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/augmentations/apiServerAugmentation.ts

@@ -115,7 +115,7 @@ export class APIServerAugmentation extends BaseAugmentation {
       const express = await import('express').catch(() => null)
       const cors = await import('cors').catch(() => null)
       const ws = await import('ws').catch(() => null)
-      const { createServer } = await import('http')
+      const { createServer } = await import('node:http')
       
       if (!express || !cors || !ws) {
         this.log('Express, cors, or ws not available. Install with: npm install express cors ws', 'error')

src/augmentations/auditLogAugmentation.ts

@@ -5,7 +5,7 @@
 
 import { BaseAugmentation } from './brainyAugmentation.js'
 import { AugmentationManifest } from './manifest.js'
-import { createHash } from 'crypto'
+import { createHash } from 'node:crypto'
 
 export interface AuditLogConfig {
   enabled?: boolean

src/augmentations/configResolver.ts

@@ -8,9 +8,9 @@
  * - Default values from schema
  */
 
-import { existsSync, readFileSync } from 'fs'
-import { join } from 'path'
-import { homedir } from 'os'
+import { existsSync, readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { homedir } from 'node:os'
 import { JSONSchema } from './manifest.js'
 
 /**
@@ -446,8 +446,8 @@ export class AugmentationConfigResolver {
       throw new Error('Cannot save configuration files in browser environment')
     }
     
-    const fs = await import('fs')
-    const path = await import('path')
+    const fs = await import('node:fs')
+    const path = await import('node:path')
     
     const configPath = filepath || this.options.configPaths?.[0] || '.brainyrc'
     const augId = this.options.augmentationId

src/augmentations/discovery/localDiscovery.ts

@@ -5,8 +5,8 @@
  * and built-in augmentations that ship with Brainy
  */
 
-import { existsSync, readdirSync, readFileSync } from 'fs'
-import { join } from 'path'
+import { existsSync, readdirSync, readFileSync } from 'node:fs'
+import { join } from 'node:path'
 import { AugmentationManifest } from '../manifest.js'
 
 export interface LocalAugmentation {