(feat) Support for conditionally hiding pages

[smallgod]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. If there is a ticket, make sure your PR title includes a conventional commit label. See existing PR titles for inspiration.
• My work conforms to the OpenMRS 3.0 Styleguide and design documentation.
• My work includes tests or is validated by existing tests.

Summary

Adds support for conditionally hiding pages if:

• All the sections in the page definition have isHidden set to a "true".
• All the questions of all the sections in the page have isHidden set to "true".
• The page's isHidden property is set to "true".

Screenshots

Before: All the questions in the Examination Details section are hidden by validation rules, which means the page shouldn't get displayed at all

After: The Examination Details section is appropriately hidden

[denniskigen]

Thanks, Arthur!