fixes and improvements for grading and disable searchable for counts …

[atmonshi]

…column

[what-the-diff[bot]]

PR Summary

• Enhanced Method Handling in TextInput.php The addition of a null coalescing operator provides improved handling in TextInput.php. This means the system is now more robust when it tries to use a value that does not exist, ensuring smoother operation and less likelihood of unexpected errors.

• Optimized Return Statements in FieldsContract.php The introduction of the null coalescing operator to a return statement in FieldsContract.php ensures that a default value is returned when there's no actual value. This minimizes chances of error occurrence due to returning null or undefined values.

• Adjusted Searchability in FormResource.php The responses_exists and responses_count columns in the FormResource.php have been made non-searchable, which simplifies the search process by excluding unnecessary columns. This means users can find relevant forms more quickly, streamlining the system's usability.