bootstrap compatible renderer

**Is your feature request related to a problem? Please describe.**
Its not clear how to write custom renderers (e.g.: for tables, only specifying "table" tag, not th, therefore not clear how to apply th styling from bootstrap

**Describe the solution you'd like**
a bootstrap renderer that can be switched into the configuration if desired.

**Describe alternatives you've considered**
writing my own custom renderer, but as mentioned, unclear how to.

**Additional context**
Issue I have run into is demonstrated here:

Input:

Output:

The issue does not identify a file, test, or entry point for the renderer configuration, so begin by locating the existing renderer implementation and configuration options. Confirm how table, th, and related elements are currently emitted, then define completion as an optional Bootstrap-compatible renderer that applies the expected table styling.

Written by the indexing model from the issue text.