Add Custom Objects into the side nav like core objects

[mrmrcoleman]

Plugin Version

0.1.0

Proposed functionality

Allow Custom Objects to show up in the left nav pane like core objects do

Use case

Currently to Add and see the list view for Custom Objects users must navigate to the Custom Object Type - this is incongruent with the usual NetBox experience in which models show up in the left nav pane

External dependencies

No response