[7.x] [i18n] move translations into NP plugin (#39177) (#39664)

* new platform xpack plugin

* update env snapshot

* update all snapshots

* plugin service tests

* fix scripts/check_ts_projects.js

* update i18nrc

* run i18n_check

.i18nrc.json

@@ -61,7 +61,7 @@
   },
   "exclude": ["src/legacy/ui/ui_render/ui_render_mixin.js"],
   "translations": [
-    "x-pack/legacy/plugins/translations/translations/zh-CN.json",
-    "x-pack/legacy/plugins/translations/translations/ja-JP.json"
+    "x-pack/plugins/translations/translations/zh-CN.json",
+    "x-pack/plugins/translations/translations/ja-JP.json"
   ]
 }

x-pack/index.js

@@ -35,7 +35,6 @@ import { rollup } from './legacy/plugins/rollup';
 import { siem } from './legacy/plugins/siem';
 import { remoteClusters } from './legacy/plugins/remote_clusters';
 import { crossClusterReplication } from './legacy/plugins/cross_cluster_replication';
-import { translations } from './legacy/plugins/translations';
 import { upgradeAssistant } from './legacy/plugins/upgrade_assistant';
 import { uptime } from './legacy/plugins/uptime';
 import { ossTelemetry } from './legacy/plugins/oss_telemetry';
@@ -80,7 +79,6 @@ module.exports = function (kibana) {
     siem(kibana),
     remoteClusters(kibana),
     crossClusterReplication(kibana),
-    translations(kibana),
     upgradeAssistant(kibana),
     uptime(kibana),
     ossTelemetry(kibana),

x-pack/plugins/translations/kibana.json

@@ -0,0 +1,8 @@
+{
+  "id": "translations",
+  "version": "0.0.1",
+  "kibanaVersion": "kibana",
+  "configPath": ["x-pack", "translations"],
+  "server": true,
+  "ui": false
+}

x-pack/legacy/plugins/translations/index.ts → x-pack/plugins/translations/server/index.ts

@@ -4,12 +4,14 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-export function translations(kibana: any) {
-  return new kibana.Plugin({
-    id: 'translations',
+class TranslationsPlugin {
+  public setup() {
+    return {};
+  }
 
-    init() {
-      // There is nothing to initialize.
-    },
-  });
+  public start() {
+    return {};
+  }
 }
+
+export const plugin = () => new TranslationsPlugin();

x-pack/tsconfig.json

@@ -5,6 +5,7 @@
     "legacy/common/**/*",
     "legacy/server/**/*",
     "legacy/plugins/**/*",
+    "plugins/**/*",
     "test_utils/**/*"
   ],
   "exclude": [