Expand markdown controls

### Feature Request



|    Q        |   A
|------------ | ------
| New Feature | no
| RFC         | no
| BC Break    | no

#### Summary

update the 'View as markdown' link to a set of controls
- Copy Page (as Markdown)
- View as Markdown
- Open in Claude

note: js, css go in dotkernel/dotkernel.github.io