Initial commit: Complete Shopify Price Updater implementation

- Full Node.js application with Shopify GraphQL API integration
- Compare At price support for promotional pricing
- Comprehensive error handling and retry logic
- Progress tracking with markdown logging
- Complete test suite with unit and integration tests
- Production-ready with proper exit codes and signal handling

package.json

@@ -0,0 +1,30 @@
+{
+    "name": "shopify-price-updater",
+    "version": "1.0.0",
+    "description": "A Node.js script to bulk update Shopify product prices based on tags",
+    "main": "src/index.js",
+    "scripts": {
+        "start": "node src/index.js",
+        "debug-tags": "node debug-tags.js",
+        "test": "jest"
+    },
+    "keywords": [
+        "shopify",
+        "price-updater",
+        "graphql",
+        "bulk-update"
+    ],
+    "author": "",
+    "license": "MIT",
+    "dependencies": {
+        "@shopify/shopify-api": "^7.7.0",
+        "dotenv": "^16.3.1",
+        "node-fetch": "^3.3.2"
+    },
+    "devDependencies": {
+        "jest": "^29.7.0"
+    },
+    "engines": {
+        "node": ">=16.0.0"
+    }
+}