fix(arktype-utils): Ensures keys are set on the correct object in an array

[jhechtf]

Fix bug in form data object grouping

Fixes a bug in the formDataToObject function where complex arrays and object combinations weren't being grouped correctly. The issue was in the logic that determines when to push the current object to the array and start a new one.

The PR adds a test case for complex array/object combinations and updates the grouping logic to:

• Track the last field processed
• Only push the current object when a non-array field repeats
• Check if the field is an array field before deciding to push

This ensures proper grouping of form data like bills[].id and bills[].name into structured objects.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6478575

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@jhecht/arktype-utils	Patch

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[jhechtf]

• fix(arktype-utils): Ensures keys are set on the correct object in an array #24 👈 (View in Graphite)
• main

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