fix: simplify input field handling in InputListComponent (#5255)

* 🔧 (index.tsx): Remove unnecessary conditional rendering for addNewInput button and simplify the logic for onClick event handler to improve code readability and maintainability.

* ✨ (button-input-list.tsx): Add a new component ButtonInputList to handle button input list functionality in the frontend
📝 (get-class-name.ts): Create a helper function getButtonClassName to generate button class names based on disabled state
📝 (get-test-id.ts): Create a helper function getTestId to generate unique test ids for input list buttons
🔄 (index.tsx): Refactor InputListComponent to use the new ButtonInputList component for handling button input list functionality in the frontend

src/frontend/package-lock.json

@@ -896,6 +896,7 @@
     },
     "node_modules/@clack/prompts/node_modules/is-unicode-supported": {
       "version": "1.3.0",
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT",
       "engines": {