changed locales from .ts to .json,

configured i18n-ally,
upgrade APIlite and regenerated BackendAPI.ts,
fixed successMessage value

.vscode/settings.json

@@ -0,0 +1,25 @@
+{
+	"i18n-ally.localesPaths": [
+		"frontend/src/locales"
+	],
+	"vue-i18n.sourceLocale": "sk",
+	"vue-i18n.i18nPaths": "frontend/src/locales",
+	"i18n-ally.dirStructure": "file",
+	"i18n-ally.displayLanguage": "sk",
+	"i18n-ally.enabledFrameworks": [
+		"vue",
+		"php-gettext"
+	],
+	"i18n-ally.enabledParsers": [
+		"json",
+		"js"
+	],
+	"i18n-ally.extract.keyMaxLength": 128,
+	"i18n-ally.keystyle": "flat",
+	"i18n-ally.tabStyle": "tab",
+	"i18n-ally.sourceLanguage": "sk",
+	"i18n-ally.extract.autoDetect": true,
+	"i18n-ally.extract.ignoredByFiles": {
+
+	}
+}