Fix phpcs error and fix Missing function's return type declaration

Problem/Motivation

FILE: project/web/modules/custom/paragraphs_usage/src/Plugin/Derivative/ParagraphsUsageMenuLinks.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | Missing required strict_types declaration
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FILE: project/web/modules/custom/paragraphs_usage/src/EntityTypeInfo.php
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FOUND 1 ERROR AND 2 WARNINGS AFFECTING 3 LINES
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  1 | ERROR   | [ ] Missing required strict_types declaration
  7 | WARNING | [x] Unused use statement
 86 | WARNING | [ ] t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: project/web/modules/custom/paragraphs_usage/src/Routing/RouteSubscriber.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | Missing required strict_types declaration
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FILE: project/web/modules/custom/paragraphs_usage/src/Plugin/Derivative/ParagraphsUsageLocalTask.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | Missing required strict_types declaration
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Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes