feat: Add sus (translations missing)

public/i18n/en.json

@@ -22,6 +22,8 @@
   "source-code": "Source Code",
   "give-feedback": "Give Feedback",
   "feedback": "Feedback",
+  "sus-title": "Rate the calculator",
+  "submit": "Submit",
   "failed-base-area": "The base area of the cage must not be below {{ MINIMUM_BASE_AREA }}m².",
   "failed-overall-area": "The overall area in the cage is to small.",
   "failed-fall-height": "The possible fall height between floors must not be above {{ maximum_fall_height }}cm.",