rector: RemoveNonExistingVarAnnotationRector

[sreichel]

• see https://getrector.com/rule-detail/remove-non-existing-var-annotation-rector

[Copilot]

Pull Request Overview

This PR enables the RemoveNonExistingVarAnnotationRector in the Rector configuration to automatically clean up incorrect @var annotations that don't match their associated variables.

• Enables the Rector rule by removing it from the excluded rules list
• Applies the rule across multiple files to fix misplaced @var annotations
• Removes one unused variable declaration that had an orphaned annotation

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
.rector.php	Enables the RemoveNonExistingVarAnnotationRector by removing it from excluded rules
app/design/adminhtml/default/default/template/cms/browser/content/newfolder.phtml	Removes orphaned @var annotation that referenced non-existent $this variable
app/code/core/Mage/ProductAlert/controllers/UnsubscribeController.php	Moves @var annotations to immediately precede their corresponding variable assignments
app/code/core/Mage/ProductAlert/controllers/AddController.php	Repositions @var annotations and refactors assignment logic for better clarity
app/code/core/Mage/Catalog/Model/Resource/Abstract.php	Corrects @var annotation to reference the correct loop variable
app/code/core/Mage/Catalog/Block/Seo/Sitemap/Tree/Category.php	Removes unused variable and its orphaned @var annotation

[sonarqubecloud]

Quality Gate failed

Failed conditions
22.2% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[sreichel]

Docblocks only. Merged.