Add WordPress 6.9+ Abilities API support #598

Job	Run time
code-quality / Lint PHP files	16s
code-quality / Lint GitHub Actions workflows	14s
code-quality / Spell check	6s
code-quality / Lint Gherkin Feature files	17s
code-quality / PHPCS	25s
code-quality / PHPStan	43s
	2m 1s

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