Add support for printing shoppinglist with thermal printer (#1273)

* Added escpos-php library

* Added button to shoppinglist print menu

* Added to translation

* Added basic printing logic and API call

* Working implementation for printing with the API

* Added openapi json

* Correctly parsing boolean parameter

* Working button in UI

* Change to grocy formatting

* Add Date

* Only show thermal print button when Feature Flag is set

* Fixed API call and added error message parsing

* Undo translation

* Add flag to print quantities as well

* Added printing notes

* Added quantity conversion

* Increse feed

* Fixed that checkbox was undefined, as dialog was already closed

* Added padding

* Formatting

* Added note about user permission

* Fixed error when using notes instead of products

* Review

- Default FEATURE_FLAG_THERMAL_PRINTER to disabled
- Added missing localization strings (and slightly adjusted one)

* Fixed merge conflicts

Co-authored-by: Bernd Bestel <bernd@berrnd.de>

controllers/BaseController.php

@@ -11,6 +11,7 @@ use Grocy\Services\ChoresService;
 use Grocy\Services\DatabaseService;
 use Grocy\Services\FilesService;
 use Grocy\Services\LocalizationService;
+use Grocy\Services\PrintService;
 use Grocy\Services\RecipesService;
 use Grocy\Services\SessionService;
 use Grocy\Services\StockService;
@@ -93,6 +94,12 @@ class BaseController
 		return StockService::getInstance();
 	}
 
+	protected function getPrintService()
+	{
+		return PrintService::getInstance();
+	}
+
+
 	protected function getTasksService()
 	{
 		return TasksService::getInstance();