feat: conditional field deletion warning

[ryankontos]

feat: conditional field deletion warning

JIRA Ticket

<JIRA_TICKET>

Description

This PR introduces a warning dialogue when attempting to delete a field that is referenced in:

• A field condition
• A section condition
• A templated string field

This ensures that deleting a field does not break existing conditions or fields.

Proposed Changes

• Added a validation check before deleting a field
• **Implemented findFieldUsage() in field-editor.tsx to detect references to a field in:
  • Field conditions
  • Section conditions
  • Templated string fields
• **Implemented isFieldUsedInCondition in condition.tsx to recursively check if a given field is used within a given condition.
• Modified field deletion logic to prevent deleting fields if they are referenced

How to Test

1. Go to the Designer UI
2. Create a new field (e.g., animal_field)
3. Use it in one or more of the following:
   • A field condition (e.g., Show if animal_field == "Elephant")
   • A section condition
   • A TemplatedStringField (e.g., "The animal is {{animal_field}}")
4. Try deleting the field
   • Expected result: A warning should appear, listing the places where the field is used.
   • If the field is not used anywhere, it should be deleted normally.

Additional Information

• This change prevents unintended data loss or errors by ensuring users are warned before deleting a referenced field.
• The warning lists all references to the field so users can update conditions or templates accordingly.

Checklist

• I have confirmed all commits have been signed.
• I have added JSDoc style comments to any new functions or classes.
• Relevant documentation such as READMEs, guides, and class comments are updated.

[stevecassidy]

Generally good, just a few comments and I think a change in behaviour - don't let them delete a field that is used.

[stevecassidy]

You already have this above in views

[stevecassidy]

Cool, I've not come across this before, very useful. Shame about the name though since we have many Record* types!

[stevecassidy]

This is good but probably belongs in condition.tsx, might be useful in other places.

[ryankontos]

Funny you say that, I originally had it in condition.tsx and decided to move it when I added template support

[stevecassidy]

I think I would prefer to forbid deleting the field if it is used in conditions - ask them to go delete the conditions first. Then we don't end up with invalid notebooks.