[Feature Request]: Add examples to generated HTML docs

[bcdxn]

Summary

OpenCLI supports examples in the spec but they are not shown in the generated HTML docs

Details

Use a two column layout in the command section of the HTML docs to show the examples defined in the OpenCLI document -- should be able to use markdown rendering.

Impact and Effort

Impacts

• gen/docs.go
• gen/templates/html

Effort: LOW