Issue-71: Fix type mismatch for condition in am_enqueue_script

[mslinnea]

Summary

Fixes #71

Description

This pull request resolves a PHPStan type mismatch error related to the condition parameter in the am_enqueue_script function. Previously, the PHPStan annotation for the $handle parameter incorrectly restricted the condition key to a string, even though the implementation and PHPDoc allowed both array and string types. This update modifies the @phpstan-param annotation in src/helpers.php to accept array<string, mixed>|string for $handle and updates the expected types for related parameters. Now, the condition key is correctly recognized by static analysis tools as supporting both arrays and strings, eliminating false-positive errors from PHPStan.

Testing Instructions

1. Use am_enqueue_script, passing $handle as an array with a condition key set to an array.
2. Run PHPStan to ensure there are no errors related to the type of condition.

Additional Context

See the original issue for more details: #71

Checklist

• I have tested these changes locally.
• I have updated documentation as needed.
• I have added relevant tests if applicable.

[kingkool68]

👍