Add initial set of block-related commands #584

Job	Run time
code-quality / Spell check	8s
code-quality / Lint GitHub Actions workflows	5s
code-quality / PHPStan	41s
code-quality / Lint Gherkin Feature files	22s
code-quality / PHPCS	23s
code-quality / Lint PHP files	21s
	2m 0s

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