dev: refactor ContentBlocksResolver and deprecate `TraverseHelpers` (… #19

Job	Run time
Release	52s
call-workflow-test-plugin / WordPress 6.6, PHP 8.2	1m 4s
call-workflow-test-plugin / WordPress 6.5, PHP 8.2	1m 12s
call-workflow-test-plugin / WordPress 6.4, PHP 8.2	1m 14s
call-workflow-test-plugin / WordPress 6.3, PHP 8.2	1m 6s
call-workflow-test-plugin / WordPress 6.2, PHP 8.2	1m 13s
call-workflow-test-plugin / WordPress 6.1, PHP 7.4	1m 2s
	7m 43s

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