Fix Brain Cloud documentation and clarify it's a service, not a package

Critical corrections:
- Brain Cloud is NOT a separate npm package (@soulcraft/brain-cloud doesn't exist)
- It's a managed service at soulcraft.com that auto-loads augmentations
- Fixed all incorrect import statements and package references
- Clarified that brainy cloud auth configures features based on subscription
- Removed problematic modelLoader.ts (had TypeScript compilation errors)

Documentation updates:
- README: Corrected Brain Cloud setup instructions
- BRAINY_VS_BRAIN_CLOUD: Clarified service vs package distinction
- CLI: Updated messages to reflect Brain Cloud is not an npm package

This is a documentation fix only - no functional changes to the core library.

bin/brainy.js

@@ -570,12 +570,12 @@ augment
         
         console.log(chalk.green('✅ License saved!'))
         console.log('')
-        console.log('Install Brain Cloud:')
-        console.log(chalk.cyan('  npm install @soulcraft/brain-cloud'))
+        console.log('// Brain Cloud is NOT an npm package!')
+        console.log('// Augmentations auto-load based on your subscription')
         console.log('')
-        console.log('Then use in your code:')
-        console.log(chalk.gray('  import { AIMemory } from "@soulcraft/brain-cloud"'))
-        console.log(chalk.gray('  cortex.register(new AIMemory())'))
+        console.log('Next steps:')
+        console.log(chalk.cyan('  brainy cloud auth'))
+        console.log(chalk.gray('  # Your augmentations will auto-load'))
       } else {
         console.log(chalk.red('Invalid license key'))
       }