Recommend similar datasets on geoCML Server Portal using DRGON

[TristanDamron]

Is your feature request related to a problem? Please describe.
One of the pillars driving development on the geoCML project is discoverability of new datasets. DRGON will allow us to index all publicly hosted geoCML deployments; when a user has navigated to a geoCML deployment via geoCML Server Portal, we can recommend them similar deployments to check out.

Describe the solution you'd like

Users can define tags for their deployment in QGIS. These tags will be sent to DRGON and will be used to determine similar deployments. A deployment is considered "similar" if it shares at least one tag with the deployment you're looking at. Results from DRGON will appear in a table at the bottom of the portal.

[TristanDamron]

Blocking this until DRGON v0.1.0