Add dashboard as a part of datasource

[ryantxu]

This plugin is looking great! It might be nice to include out-of-the-box dashboards that can show base status.

This moves the current dashboard to a folder that can get bundled and shown here:

but note... it does not actually work yet because the exported dashboard should have the source set as a variable. To do that, can you load a working dashboard, then:

1. click the "share dashboard" icon next to the title
2. use export for sharing externally

No need to merge this PR if it is easier to do in your own repo :)

[mikhail-vl]

Thank you!