Issue #3317635: Coding standards

added 27 commits

• 5641cb36...559bff38 - 20 commits from branch project:8.x-2.x
• 9dd953a8 - Fix eslint
• b9af3e29 - Merge remote-tracking branch 'refs/remotes/origin/8.x-2.x' into 3317635-coding-standards
• 171dec99 - Fix cspell
• b50c268a - Fix eslint
• 44415de7 - PHPCS fix
• 39259727 - PHPSTAN issues
• eb8511dd - phpcs, cspell, eslint amends

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merged