chore(deps): move @ember/string to dependencies

Author: derrabauke

package.json

@@ -30,6 +30,7 @@
   "dependencies": {
     "@apollo/client": "^3.8.8",
     "@babel/core": "^7.23.5",
+    "@ember/string": "^3.1.1",
     "@embroider/macros": "^1.13.3",
     "base64-js": "^1.5.1",
     "ember-auto-import": "^2.7.0",
@@ -46,7 +47,6 @@
     "@babel/eslint-parser": "7.23.3",
     "@babel/plugin-proposal-decorators": "7.23.5",
     "@ember/optional-features": "2.0.0",
-    "@ember/string": "3.1.1",
     "@ember/test-helpers": "^3.3.0",
     "@ember/test-waiters": "^3.1.0",
     "@embroider/test-setup": "3.0.3",