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.

models/sentence-encoder/metadata.json

@@ -1,12 +0,0 @@
-{
-  "name": "universal-sentence-encoder",
-  "version": "1.0.0",
-  "description": "Universal Sentence Encoder model for text embeddings",
-  "dimensions": 512,
-  "date": "2025-08-01T21:59:56.632Z",
-  "source": "tensorflow-models/universal-sentence-encoder",
-  "savedLocally": true,
-  "savedWith": "manual-embedding",
-  "embeddingSize": 512,
-  "approach": "tfhub-reference"
-}

models/sentence-encoder/model.json

@@ -1,52 +0,0 @@
-{
-  "format": "graph-model",
-  "generatedBy": "TensorFlow.js v4.22.0",
-  "convertedBy": "Brainy download-model script",
-  "modelTopology": {
-    "class_name": "GraphModel",
-    "config": {
-      "name": "universal-sentence-encoder"
-    }
-  },
-  "userDefinedMetadata": {
-    "signature": {
-      "inputs": {
-        "inputs": {
-          "name": "inputs",
-          "dtype": "string",
-          "shape": [
-            -1
-          ]
-        }
-      },
-      "outputs": {
-        "outputs": {
-          "name": "outputs",
-          "dtype": "float32",
-          "shape": [
-            -1,
-            512
-          ]
-        }
-      }
-    }
-  },
-  "weightsManifest": [
-    {
-      "paths": [
-        "group1-shard1of1.bin"
-      ],
-      "weights": [
-        {
-          "name": "embedding_matrix",
-          "shape": [
-            512,
-            512
-          ],
-          "dtype": "float32"
-        }
-      ]
-    }
-  ],
-  "modelUrl": "https://tfhub.dev/tensorflow/tfjs-model/universal-sentence-encoder/1/default/1"
-}