Refactor of the page.html.twig template, eliminate content page template

[trubach]

📝 Description

This refactor takes the approach where the paragraphs that need to be outside of the two-column layout are removed from the page.content variable and put into a separate page.full_width_content variable.

Still to do:

• The body field on full-width pages goes to the width of the browser. We need to figure out a way to make the body field default to a normal page width without affecting other items
• On the news content type, the sub-title and author info are the width of the browser

Fixes #1102

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✅ Peer Review Checklist

Reviewers: Please verify the following before approving.

• The pull request links to the issue it is addressing in the comment and in the "Development" section of the PR
• There is a short summary that describes how the fix is implemented
• Verifying work: Verify that the changes made are addressing the linked issue
• Accessibility: Changes that might impact accessibility are reviewed to work with keyboard navigation and screen readers
• Responsive: Layout is tested on desktop, tablet, and mobile screens
• Config changes: Any configuration updates are tested and verified using the Distribution Update import
• Security: Output is sanitized (using t(), Twig auto-escaping, etc.). No secrects included (API keys, etc.)
• Cleanliness: All debug code (ksm(), dpm(), console.log) has been removed.
• Comments: Complex logic is explained inline.
• Documentation: Any relevant documentation has been updated (this can be a separate issue if needed)

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📸 Screenshots / Video (Optional)

If this is a UI change, please attach a screenshot or a quick screen recording of the change in action.

[trubach]

Abandoning this PR / branch. See PR #1170 for the hopefully final PR