chore(widget): extract detail view and font into separate files

[andrewedstrom]

Description

Continuation of https://github.com/Docmaps-Project/docmaps/pull/179. The goal here is to shrink down the docmaps-widget file and separate concerns

Related Issues

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Checklist

• [x] I have tested these changes locally and they work as expected.
• [ ] I have added or updated tests to cover any new functionality or bug fixes.
• [ ] I have updated the documentation to reflect any changes or additions to the project.
• [x] I have followed the project's code of conduct and conventions for commit messages.

Additional Information

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