I18n: Add Chinese (Simplified) (#56739)

* Prevent _old.json files from being created

* Add contrib docs for adding new locale

* add chinese (simplified)

public/locales/en-US/grafana.json

@@ -2,9 +2,10 @@
   "common": {
     "locale": {
       "default": "Default",
-      "en": "English",
-      "es": "Spanish",
-      "fr": "French"
+      "en-US": "English",
+      "es-ES": "Spanish",
+      "fr-FR": "French",
+      "zh-Hans": "Chinese (Simplified)"
     },
     "save": "Save"
   },

public/locales/es-ES/grafana.json

@@ -2,9 +2,10 @@
   "common": {
     "locale": {
       "default": "",
-      "en": "",
-      "es": "",
-      "fr": ""
+      "en-US": "",
+      "es-ES": "",
+      "fr-FR": "",
+      "zh-Hans": ""
     },
     "save": ""
   },

public/locales/fr-FR/grafana.json

@@ -2,9 +2,10 @@
   "common": {
     "locale": {
       "default": "",
-      "en": "",
-      "es": "",
-      "fr": ""
+      "en-US": "",
+      "es-ES": "",
+      "fr-FR": "",
+      "zh-Hans": ""
     },
     "save": ""
   },

public/locales/i18next-parser.config.js

@@ -2,7 +2,7 @@ module.exports = {
   // Default namespace used in your i18next config
   defaultNamespace: 'grafana',
 
-  locales: ['en-US', 'fr-FR', 'es-ES', 'pseudo-LOCALE'],
+  locales: ['en-US', 'fr-FR', 'es-ES', "zh-Hans", 'pseudo-LOCALE'],
 
   output: './public/locales/$LOCALE/$NAMESPACE.json',
 
@@ -10,6 +10,8 @@ module.exports = {
 
   sort: true,
 
+  createOldCatalogs: false,
+
   // Don't include default values for English, they'll remain in the source code
   skipDefaultValues: (locale) => locale !== 'en-US',
 };

public/locales/pseudo-LOCALE/grafana.json

@@ -2,9 +2,10 @@
   "common": {
     "locale": {
       "default": "Đęƒäūľŧ",
-      "en": "Ēʼnģľįşĥ",
-      "es": "Ŝpäʼnįşĥ",
-      "fr": "Fřęʼnčĥ"
+      "en-US": "Ēʼnģľįşĥ",
+      "es-ES": "Ŝpäʼnįşĥ",
+      "fr-FR": "Fřęʼnčĥ",
+      "zh-Hans": "Cĥįʼnęşę (Ŝįmpľįƒįęđ)"
     },
     "save": "Ŝävę"
   },
@@ -441,4 +442,4 @@
   "user-sessions": {
     "loading": "Ŀőäđįʼnģ şęşşįőʼnş..."
   }
-}
+}

public/locales/zh-Hans/grafana.json

@@ -2,9 +2,10 @@
   "common": {
     "locale": {
       "default": "",
-      "en": "",
-      "es": "",
-      "fr": ""
+      "en-US": "",
+      "es-ES": "",
+      "fr-FR": "",
+      "zh-Hans": ""
     },
     "save": ""
   },