Rename package to shopkeeper/module-vendor-notes and fix delete button issue

- Update package name from shopkeeper/vendornotes to shopkeeper/module-vendor-notes to follow naming conventions
- Fix invalid CSS selector issue by prefixing numeric row IDs with 'row_' in getArrayRows()
- Resolves JavaScript error: "Failed to execute 'querySelectorAll' on 'Document': 'tr#0 button.action-delete' is not a valid selector"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "shopkeeper/vendornotes",
+    "name": "shopkeeper/module-vendor-notes",
     "description": "Magento 2 module that adds vendor notes to orders",
     "type": "magento2-module",
     "license": "MIT",