StaticCode: Render doc comments.

The renderer already has access to the `docComment` property on the reflected types, we just need to collect it while reflecting everything and then render it.

Start in the StaticCode renderer and trace how reflected types are collected. Check where each reflected type's docComment property is available, then follow the rendering path; done means doc comments are collected during reflection and appear in the rendered output.

Written by the indexing model from the issue text.