Fix the issues reported by phpcs

Problem/Motivation

PHPCS reports the following:

C:\xampp\htdocs\backendassignment\web\modules\contrib>phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig hook_post_action

FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\hook_post_action\hook_post_action.api.php
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FOUND 2 ERRORS AND 3 WARNINGS AFFECTING 5 LINES
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   1 | ERROR   | [x] End of line character is invalid; expected "\n" but found "\r\n"
  16 | WARNING | [ ] Line exceeds 80 characters; contains 82 characters
  30 | WARNING | [ ] Only string literals should be passed to t() where possible
 130 | WARNING | [ ] Only string literals should be passed to t() where possible
 199 | ERROR   | [x] Whitespace found at end of line
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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\hook_post_action\hook_post_action.module
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FOUND 4 ERRORS AND 1 WARNING AFFECTING 4 LINES
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  1 | ERROR   | [x] End of line character is invalid; expected "\n" but found "\r\n"
 25 | WARNING | [ ] Format should be "* Implements hook_foo().", "* Implements hook_foo_BAR_ID_bar() for xyz_bar().",, "* Implements hook_foo_BAR_ID_bar() for xyz-bar.html.twig.", "* Implements
    |         |     hook_foo_BAR_ID_bar() for xyz-bar.tpl.php.", or "* Implements hook_foo_BAR_ID_bar() for block templates."
 25 | ERROR   | [x] Doc comment short description must end with a full stop
 34 | ERROR   | [x] Data types in @param tags need to be fully namespaced
 55 | ERROR   | [x] Namespaced classes/interfaces/traits should be referenced with use statements
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PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\hook_post_action\hook_post_action_example\hook_post_action_example.module
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FOUND 4 ERRORS AFFECTING 4 LINES
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   1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
 112 | ERROR | [x] Case breaking statements must be followed by a single blank line
 114 | ERROR | [x] Case breaking statements must be followed by a single blank line
 116 | ERROR | [x] Case breaking statements must be followed by a single blank line
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PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: C:\xampp\htdocs\backendassignment\web\modules\contrib\hook_post_action\README.txt
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FOUND 1 ERROR AND 3 WARNINGS AFFECTING 4 LINES
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  2 | WARNING | [ ] Line exceeds 80 characters; contains 107 characters
  4 | WARNING | [ ] Line exceeds 80 characters; contains 121 characters
 21 | WARNING | [ ] Line exceeds 80 characters; contains 105 characters
 26 | ERROR   | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 1.02 secs; Memory: 6MB

Steps to reproduce

Run the phpcs command on the module.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes