Update remove hr row behaviour

[Kariamos]

This pull request introduces changes to the Human Resources section of the campaign quote flow, specifically to improve how new, unsaved items are handled in the UI. The main focus is on tracking whether an item has been saved and updating the removal logic for these items.

Handling of unsaved items:

• Added a notSaved property to both the form item type in FormProvider.tsx and the RateOption type in index.tsx, allowing the UI to distinguish between saved and unsaved items. [1] [2]

User interaction improvements:

• Updated the logic for the delete button so that clicking it immediately removes unsaved items, while saved items prompt a confirmation before removal.
• Modified the "Add" button to ensure new items are marked as unsaved by default, improving clarity and consistency in user experience.