Add editable-code box component to be able to edit the SQL query

[gadenbuie]

A module function that's attached to a querychat instance that:

1. Shows the SQL code in with highlighting
2. The SQL code is editable
3. Edits update the query being applied
4. Even better: update the query in the tool history (update dashboard tool)
5. Even even better: Update the query and result and regenerate (query tool)

Prior art:

1. I used Prism Code Editor for light-weight code editing in the brand.yml example app
2. That could easily be turned into a module here in querychat that we use for editable code blocks