Forms: Add Form_Response class

[enejb]

This PR add a couple of new classes that make dealing with form seponses easier.

Fixes FORMS-NEW

Currently we don't have a structure way that we deal with Form Responses. This PR in an attempt to improve this.
And also add more test to the code base.
We are also attempting to deal

Proposed changes:

• Make it easier to deal with from responses by creating form reponse object that works the same as before being persistet to the DB and after.

Other information:

• Have you written new tests for your changes, if applicable?
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Testing instructions:

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[Copilot]

Pull Request Overview

This PR introduces structured classes and tests to standardize handling of form responses before and after persistence.

• Adds a Response_Field class with accompanying unit tests.
• Adds a Form_Response class with unit tests and a test utility for legacy feedback.
• Cleans up a typo in Contact_Form_Test and updates the changelog.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
projects/packages/forms/tests/php/contact-form/class-utility.php	Added a test utility for creating legacy feedback posts.
projects/packages/forms/tests/php/contact-form/Response_Field_Test.php	Added unit tests for the Response_Field class.
projects/packages/forms/tests/php/contact-form/Form_Response_Test.php	Added unit tests for the Form_Response class.
projects/packages/forms/tests/php/contact-form/Contact_Form_Test.php	Removed a typo in test data setup (post_contnt).
projects/packages/forms/src/contact-form/class-response-field.php	Introduced the Response_Field class.
projects/packages/forms/src/contact-form/class-form-response.php	Introduced the Form_Response class.
projects/packages/forms/changelog/update-form-response-storage	Added changelog entry for the new form response classes.

Comments suppressed due to low confidence (6)

projects/packages/forms/tests/php/contact-form/Form_Response_Test.php:56

• [nitpick] The test method name has an extra 'is'; rename to test_form_response_matches_empty_data for clarity and consistency.

	public function test_form_response_is_matches_empty_data() {

projects/packages/forms/tests/php/contact-form/Contact_Form_Test.php:762

• The test removed the typo key but no longer provides a post_content value; add a correct 'post_content' => 'testing' to ensure the test inserts content.

				'post_title'  => 'testing',

projects/packages/forms/src/contact-form/class-response-field.php:11

• [nitpick] The class docblock summary is incomplete; provide a full description of what Response_Field handles.

 * Handles the

projects/packages/forms/src/contact-form/class-response-field.php:108

• The docblock says @return string but get_meta() returns an array; update it to @return array.

	 * @return string

projects/packages/forms/src/contact-form/class-form-response.php:133

• Variable name typo: parese_content should be parsed_content for readability.

			$parese_content = static::parse_content( $this->post->post_content, $this->post->page_template );

projects/packages/forms/src/contact-form/class-form-response.php:241

• The docblock indicates @return WP_Post|null but get_ip() returns a string or null; update the return type to string|null.

	 * @return WP_Post|null

[jp-launch-control]

Code Coverage Summary

Cannot generate coverage summary while tests are failing. 🤐

Please fix the tests, or re-run the Code coverage job if it was something being flaky.

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