Fix the issues reported by phpcs

Problem/Motivation

FILE: /var/www/html/vb/d_cont/custom_account_link/README.txt
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FOUND 1 ERROR AND 1 WARNING AFFECTING 2 LINES
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29 | WARNING | [ ] Line exceeds 80 characters; contains 86 characters
42 | ERROR | [x] Expected 1 newline at end of file; 2 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
-----------------------------------------------------------------------

FILE: .../www/html/vb/d_cont/custom_account_link/custom_account_link.links.menu.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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13 | 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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FILE: ...var/www/html/vb/d_cont/custom_account_link/custom_account_link.routing.yml
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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7 | WARNING | The administration page callback should probably use "administer
| | site configuration" - which implies the user can change
| | something - rather than "access administration pages" which is
| | about viewing but not changing configurations.
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FILE: /var/www/html/vb/d_cont/custom_account_link/custom_account_link.module
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FOUND 1 ERROR AFFECTING 1 LINE
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1 | ERROR | [x] Missing file doc comment
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
----------------------------------------------------------------------------

FILE: .../html/vb/d_cont/custom_account_link/src/Form/CustomAccountLinkSettings.php
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FOUND 1 ERROR AND 4 WARNINGS AFFECTING 5 LINES
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38 | ERROR | [ ] The array declaration extends to column 84 (the limit is
| | 80). The array content should be split up over multiple
| | lines
39 | WARNING | [x] A comma should follow the last multiline array item. Found:
| | )
48 | WARNING | [x] A comma should follow the last multiline array item. Found:
| | ]
49 | WARNING | [x] A comma should follow the last multiline array item. Found:
| | ]
50 | WARNING | [x] A comma should follow the last multiline array item. Found:
| | ]
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PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: ...ww/html/vb/d_cont/custom_account_link/src/Plugin/Menu/RegisterMenuLink.php
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FOUND 1 ERROR AFFECTING 1 LINE
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69 | ERROR | [x] Missing function doc comment
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 65ms; Memory: 10MB

Steps to reproduce

Execute the command: phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig custom_account_link/

Proposed resolution

Fix all the errors and warnings for Drupal and DrupalPractice coding standards

Remaining tasks

Patch review