Bump to 3.0.0 and add es translation (#25)

Bumped with:
`yarn plugin-helpers version --sync legacy`

Translation file generated from root level OSD core with:
`./scripts/use_node scripts/i18n_extract.js --output-dir plugins/dashboards-i18n/translations/`

To test:
* Clone this repo into `OSD core/plugins`
* `yarn osd bootstrap`
* Start OpenSearch with `yarn opensearch snapshot`
* Start OpenSearch Dashboards with `yarn start --i18n.locale=es`

Appended to some string with `x` to verify working functionality.

Signed-off-by: Kawika Avilla <kavilla414@gmail.com>

Author: kavilla

.i18nrc.json

@@ -3,5 +3,5 @@
   "paths": {
     "i18nDashboards": "."
   },
-  "translations": []
+  "translations": ["translations/es.json"]
 }

opensearch_dashboards.json

@@ -1,9 +1,9 @@
 {
   "id": "i18nDashboards",
-  "version": "2.1.0.0",
-  "opensearchDashboardsVersion": "2.1.0",
+  "version": "3.0.0.0",
+  "opensearchDashboardsVersion": "3.0.0",
   "server": true,
   "ui": false,
   "requiredPlugins": [],
   "optionalPlugins": []
-}
+}

package.json

@@ -1,12 +1,13 @@
 {
   "name": "i18n-dashboards",
-  "version": "2.1.0.0",
+  "version": "3.0.0.0",
   "description": "plugin for opensearch-dashboards translation",
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "lint": "node ../../scripts/eslint .",
-    "update-version": "node scripts/update_opensearch_dashboards_version.js"
+    "lint": "../../scripts/use_node ../../scripts/eslint .",
+    "update-version": "../../scripts/use_node scripts/update_opensearch_dashboards_version.js",
+    "plugin-helpers": "../../scripts/use_node ../../scripts/plugin_helpers"
   },
   "repository": {
     "type": "git",
@@ -19,4 +20,4 @@
     "url": "https://github.com/opensearch-project/dashboards-i18n/issues"
   },
   "homepage": "https://github.com/opensearch-project/dashboards-i18n#readme"
-}
+}

scripts/update_opensearch_dashboards_version.js

@@ -1,3 +1,8 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 const fs = require('fs');
 const path = require('path');
 

server/plugin.ts

@@ -14,7 +14,8 @@ import {
 import { I18nDashboardsPluginSetup, I18nDashboardsPluginStart } from './types';
 import { defineRoutes } from './routes';
 
-export class I18nDashboardsPlugin implements Plugin<I18nDashboardsPluginSetup, I18nDashboardsPluginStart> {
+export class I18nDashboardsPlugin
+  implements Plugin<I18nDashboardsPluginSetup, I18nDashboardsPluginStart> {
   private readonly logger: Logger;
 
   constructor(initializerContext: PluginInitializerContext) {