Fix the issues reported by phpcs

Running phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig route_iframes shows the following errors/warnings that should be fixed.

FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\route_iframes.module
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Controller\RouteIframeController.php
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FOUND 9 ERRORS AND 1 WARNING AFFECTING 10 LINES
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   1 | ERROR   | [x] End of line character is invalid; expected "\n" but found "\r\n"
  16 | WARNING | [ ] The class short comment should describe what the class does and not simply repeat the class name
 104 | ERROR   | [ ] Missing parameter comment
 106 | ERROR   | [ ] Description for the @return value is missing
 122 | ERROR   | [ ] Missing parameter comment
 124 | ERROR   | [ ] Description for the @return value is missing
 150 | ERROR   | [ ] Parameter $tabId is not described in comment
 155 | ERROR   | [ ] Doc comment for parameter $tab does not match actual variable name $tabId
 173 | ERROR   | [ ] Missing parameter comment
 175 | ERROR   | [ ] Description for the @return value is missing
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Entity\RouteIframeConfigEntity.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Entity\RouteIframeConfigEntityInterface.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Form\RouteIframeConfigEntityDeleteForm.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Form\RouteIframeConfigEntityForm.php
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FOUND 1 ERROR AND 3 WARNINGS AFFECTING 4 LINES
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   1 | ERROR   | [x] End of line character is invalid; expected "\n" but found "\r\n"
  15 | WARNING | [ ] The class short comment should describe what the class does and not simply repeat the class name
 150 | WARNING | [ ] \Drupal calls should be avoided in classes, use dependency injection instead
 158 | WARNING | [ ] \Drupal calls should be avoided in classes, use dependency injection instead
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Form\RouteIframesConfiguration.php
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FOUND 1 ERROR AND 5 WARNINGS AFFECTING 6 LINES
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   1 | ERROR   | [x] End of line character is invalid; expected "\n" but found "\r\n"
  15 | WARNING | [ ] The class short comment should describe what the class does and not simply repeat the class name
  92 | WARNING | [x] A comma should follow the last multiline array item. Found: ]
  94 | WARNING | [x] '@todo: These tabs should have an order / weight to control tab order.' should match the format '@todo Fix problem X here.'
 126 | WARNING | [x] A comma should follow the last multiline array item. Found: )
 285 | WARNING | [x] '@todo: If tabs change, the related configuration entities need to change.' should match the format '@todo Fix problem X here.'
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PHPCBF CAN FIX THE 5 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Plugin\Derivative\DynamicLocalTasks.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\RouteIframeConfigEntityHtmlRouteProvider.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\RouteIframeConfigEntityListBuilder.php
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FOUND 1 ERROR AND 3 WARNINGS AFFECTING 4 LINES
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   1 | ERROR   | [x] End of line character is invalid; expected "\n" but found "\r\n"
  77 | WARNING | [ ] t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
 103 | WARNING | [ ] t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
 143 | WARNING | [x] Inline @var declarations should use the /** */ delimiters
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PHPCBF CAN FIX THE 2 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\route_iframes\src\Routing\IframeRoutes.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 2.7 secs; Memory: 6MB