fix(ui5-icons): generate i18n JSON imports (#13583)

The icons-collection build pointed the i18n JSON imports generator at `src/generated/assets/i18n`, which only contains `.json` files. The generator regex only matches `.properties` files, so it found nothing and wrote an empty i18n.ts — making Assets.js a noop and causing the "Message bundle assets are not configured" warning.

Fix by pointing the generator at `src/i18n` (the .properties source), consistent with how components-package configures the same step.

Fixes #13417

Author: nnaydenow

packages/tools/icons-collection/nps.js

@@ -67,7 +67,7 @@ const getScripts = (options) => {
 			},
 			jsonImports: {
 				default: "ui5nps build.jsonImports.i18n",
-				i18n: `ui5nps-script "${LIB}/generate-json-imports/i18n.js" src/generated/assets/i18n src/generated/json-imports`,
+				i18n: `ui5nps-script "${LIB}/generate-json-imports/i18n.js" src/i18n src/generated/json-imports`,
 			},
 			icons: createJSImportsCmd,
 		},