php-cs-fixer: add page (#8577)

* php-cs-fixer: add page

* php-cs-fixer: apply fixes from code review

pages/common/php-cs-fixer.md

@@ -0,0 +1,36 @@
+# PHP-CS-Fixer
+
+> Automatic coding style fixer for PHP.
+> More information: <https://github.com/FriendsOfPHP/PHP-CS-Fixer>.
+
+- Execute code style fixing in the current directory:
+
+`php-cs-fixer fix`
+
+- Execute code style fixing for a specific directory:
+
+`php-cs-fixer fix {{path/to/directory}}`
+
+- Execute code style linting without applying changes:
+
+`php-cs-fixer fix --dry-run`
+
+- Execute code style fixes using specific rules:
+
+`php-cs-fixer fix --rules={{rules}}`
+
+- Display the rules that have been applied:
+
+`php-cs-fixer fix --verbose`
+
+- Output the results in a different format:
+
+`php-cs-fixer fix --format={{txt|json|xml|checkstyle|junit|gitlab}}`
+
+- Display files that require fixing:
+
+`php-cs-fixer list-files`
+
+- Describe a rule or ruleset:
+
+`php-cs-fixer describe {{rule}}`