Grocycode, label printing (#1500)

* Grocycode: Productpicker, StockService

* Grocycode: Datamatrix generation

* Grocycode: Display in UI, make Images downloadable

* Grocycode: Do not show on product card

* Grocycode: Stockentry Label view

* Grocycode: Webhooks & Labelprinter Feature

* Grocycode: Manual Label printing

* Grocycode: Print Label from product form

* Quagga2: use zxing for DataMatrix recognition

* Grocycode: Default settings for label printing

* Prepare merge of master

* Grocycode: docs

* Docs: label printing webhook

* Review

- "grocy" is currently written lower-case everywhere, so let's do this also for "grocycode"
- Unified phrases / capitalization
- Minor UI adjustments (mainly context menu item ordering / ordering/spacing on product edit page)
- Documented API changes for Swagger UI (grocy.openapi.json)
- Reverted German localizations (those are managed via Transifex; would cause conflicts when manually edited - will import them later there)
- Reverted a somehow messed up localization string (productform/help text for `cumulate_min_stock_amount_of_sub_products`)
- Suppress deprecation warnings when generating Datamatrix PNG (otherwise the PNG is invalid, https://github.com/jucksearm/php-barcode/issues/3)
- Default `FEATURE_FLAG_LABELPRINTER` to disabled

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

public/viewjs/components/barcodescanner.js

@@ -1,5 +1,9 @@
 Grocy.Components.BarcodeScanner = {};
 
+//import Quagga2DatamatrixReader from '../../components_unmanaged/quagga2-reader-datamatrix/index.js'
+
+Quagga.registerReader("datamatrix", Quagga2DatamatrixReader);
+
 Grocy.Components.BarcodeScanner.LiveVideoSizeAdjusted = false;
 Grocy.Components.BarcodeScanner.CheckCapabilities = async function()
 {
@@ -96,7 +100,8 @@ Grocy.Components.BarcodeScanner.StartScanning = function()
 			readers: [
 				"ean_reader",
 				"ean_8_reader",
-				"code_128_reader"
+				"code_128_reader",
+				"datamatrix"
 			],
 			debug: {
 				showCanvas: Grocy.UserSettings.quagga2_debug,