fix(engine): support CSS content-visibility style

[shunguoy]

• Rule bug: most of the rules related to content display

This PR is related to the following issue(s):

#1008

Additional information can be found here:

Testing reference:

Test case: test/v2/checker/accessibility/rules/heading_content_exists_ruleunit/contentvisibility-auto.html
After the fix is applied, the Recommendation "Heading element has no descriptive content" should disappear.

I have conducted the following for this PR:

• [ x] I validated this code in Chrome and FF
• [x ] I validated this fix in my local env
• [x ] I provided details for testing
• This PR has been reviewed and is ready for test
• [x ] I understand that the title of this PR will be used for the next release notes.

[ErickRenteria]

Validated