fix(td-ref-attr): report headers attribute referencing other <td> elements as unsupported

[engineerklimov]

Fix for the header attribute check. The check will report cells that references other <td> elements. Added unit and integrations tests as requested in corresponding issue.

Closes: #3987

[engineerklimov]

Please, let me know if there are any changes needed. Thanks! @WilcoFiers and @straker for vis.

[WilcoFiers]

@engineerklimov Heyya, apologies about the delays. Lots to do. I'll try to get to it within the week.

[engineerklimov]

Appreciate your response, Sir Looking forward to the review

[engineerklimov]

I have NVDA + Firefox and JAWS + Chrome, can you describe what tests need to be done?

[WilcoFiers]

I'm going to change this PR title to "feat". This PR makes the rule stricter, we can't put that in a patch release.

[engineerklimov]

@WilcoFiers I did all changes, the only thing left is locales updates. Can you check error messages? If they are fine i will update all translations.

[engineerklimov]

It looks like fmt_check is still showing 1 error to resolve, + it'd be good to do an npm run build to re-generate /locales/_template.json to match the most recent rule text update.

Other than those, this looks good to me!

I did updates you requested, there is problem with @WilcoFiers test case with wrong closing tag. Prettier shows error here somehow line ignore not working.

So i updated .prettierignore, let me know if there is better way to fix it.

[engineerklimov]

I pursue your approvals guys @WilcoFiers @dbjorge @straker :slightly_smiling_face:

[dbjorge]

(@WilcoFiers , once you've done the security review for my editorial commit, feel free to merge)

[WilcoFiers]

For the bookx: Reviewed for security.