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.

src/utils/distance.ts

@@ -152,7 +152,7 @@ export async function calculateDistancesBatch(
               // Ensure TextEncoder/TextDecoder are globally available in Node.js
               const util = await import('util')
               if (typeof global.TextEncoder === 'undefined') {
-                global.TextEncoder = util.TextEncoder
+                global.TextEncoder = util.TextEncoder as unknown as typeof TextEncoder
               }
               if (typeof global.TextDecoder === 'undefined') {
                 global.TextDecoder = util.TextDecoder as unknown as typeof TextDecoder