User permissions

[smk4664]

Closes: #112

What's Changed

Adds a new feature to Link the Nautobot User with a Chat User. This allows more granular permissions for chat commands, as the Chat User will only see devices/racks/circuits/etc. that they have permissions to in Nautobot. This will open up new possibilities for Chat Commands, like running jobs, creating Notes, creating/updating records etc.

TODO

• Explanation of Change(s)
• Added change log fragment(s) (for more information see the documentation)
• Attached Screenshots, Payload Example
• Unit, Integration Tests
• Documentation Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design

[snaselj]

Left a few suggestions, with my limited knowledge LGTM

Great feaure 👍