Add JSON viewer or options to open JSON in new tab or download

[eigenbeam]

When viewing JSON in the dashboard--for example on the Executions page's Event Input Details--render the JSON so that I can collapse / expand sections, etc.

Alternatively, provide an option to open the JSON in a new tab so I can use a browser extension which will do this.

Alternatively (or in addition to), provide an option to download the JSON as a file.