fix: resolve build errors in invoice_az app

Fixed two critical issues preventing app installation:
1. Removed non-existent e_taxes_parties_list.js from hooks.py
2. Added missing patches.txt file (required for Frappe app detection)
3. Added minimal bundle.js file to satisfy build system

Without patches.txt, the app was not recognized as a valid Frappe app,
causing esbuild to fail with "paths[0] must be of type string" error.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

invoice_az/hooks.py

@@ -17,7 +17,6 @@ doctype_js = {
 
 doctype_list_js = {
 	"E-Taxes Item": "client/e_taxes_items_list.js",
-	"E-Taxes Parties": "client/e_taxes_parties_list.js",
 	"E-Taxes Suppliers": "client/e_taxes_suppliers_list.js",
 	"E-Taxes Customers": "client/e_taxes_customers_list.js",
 	"E-Taxes Unit": "client/e_taxes_unit_list.js",

invoice_az/public/js/invoice_az.bundle.js

@@ -0,0 +1,2 @@
+// Empty bundle file for invoice_az
+// This file is required for the build process