refactor: simplify build system and improve model loading flexibility

- Remove Rollup bundling in favor of direct TypeScript compilation
- Move from bundled models to dynamic model loading with configurable paths
- Add Docker deployment examples and documentation
- Implement robust model loader with fallback mechanisms
- Update storage adapters for better cross-environment compatibility
- Add comprehensive tests for model loading and package installation
- Simplify package.json scripts and remove complex build configurations
- Clean up deprecated demo files and old bundling scripts

BREAKING CHANGE: Models are no longer bundled with the package. They are now loaded dynamically from CDN or custom paths.

tests/verify-model-loading.js

@@ -0,0 +1,37 @@
+#!/usr/bin/env node
+
+/**
+ * Simple script to verify model loading behavior
+ * Run with: node tests/verify-model-loading.js
+ */
+
+import { BrainyData } from '../dist/unified.js'
+
+console.log('Testing Brainy model loading behavior...\n')
+
+const db = new BrainyData({
+  forceMemoryStorage: true,
+  dimensions: 512
+})
+
+console.log('Initializing BrainyData...')
+await db.init()
+
+console.log('\nAttempting to embed text...')
+const text = 'This is a test sentence for embedding'
+const id = await db.add({ content: text })
+
+console.log(`\n✅ Successfully added text with ID: ${id}`)
+
+// Test search
+const results = await db.search('test sentence', 1)
+console.log(`\n✅ Search returned ${results.length} result(s)`)
+
+console.log('\n---')
+console.log('Model loading test complete!')
+console.log('\nNOTE: Check the console output above to see:')
+console.log('1. If @soulcraft/brainy-models was found and used (best performance)')
+console.log('2. If fallback to URL loading occurred (with warning)')
+console.log('3. Verification that the correct model was loaded')
+
+process.exit(0)