add nls module and externalize human readable strings

extensions/references-view/package.json

@@ -406,6 +406,9 @@
     "compile": "npx gulp compile-extension:references-view",
     "watch": "npx gulp watch-extension:references-view"
   },
+  "dependencies": {
+    "vscode-nls": "^5.0.0"
+  },
   "devDependencies": {
     "@types/node": "16.x"
   }