Add initial set of block-related commands #591

Job	Run time
code-quality / Spell check	7s
code-quality / Lint GitHub Actions workflows	5s
code-quality / Lint PHP files	1m 58s
code-quality / Lint Gherkin Feature files	16s
code-quality / PHPCS	19s
code-quality / PHPStan	42s
	3m 27s

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