Implement Field Blocking Based on Cookie Consent

Also, added a patch with the changes.

I added some validation for the route and some access checks to make sure users can only get fields and view modes they have access for to not leak any data. Didn't manage yet to do a test in a test site though. Feel free to check again. I will merge this after it has been properly tested in a real drupal environment.

I tested the functionality with the latest changes on the Drupal website. After accepting the cookies, the field’s content was correctly displayed in place of the placeholder block.
The functionality was verified for both logged-in and anonymous users and tested with different field types.

Thanks for testing it again!
I merged it now and we can create a new feature release and update the modules description.