Adds acceptance doc for networking UI

* Adds gerkin feature file for networking visualization
* Adds implementation details to networking.md

docs/networking/mode.yml

@@ -0,0 +1,96 @@
+diagram_id: 68
+finite_state_machine_id: 9
+name: mode_fsm
+states:
+- id: 7
+  label: Device
+  x: 558
+  y: 821
+- id: 2
+  label: Interface
+  x: 340
+  y: 1053
+- id: 5
+  label: MultiSite
+  x: 569
+  y: -88
+- id: 4
+  label: Process
+  x: 833
+  y: 1051
+- id: 6
+  label: Rack
+  x: 571
+  y: 486
+- id: 3
+  label: Site
+  x: 564
+  y: 201
+- id: 1
+  label: Start
+  x: 568
+  y: -379
+transitions:
+- from_state: Device
+  label: onMouseWheel
+  to_state: Process
+- from_state: Device
+  label: onMouseWheel
+  to_state: Rack
+- from_state: Device
+  label: onMouseWheel
+  to_state: Interface
+- from_state: Device
+  label: onScaleChanged
+  to_state: Interface
+- from_state: Device
+  label: onScaleChanged
+  to_state: Rack
+- from_state: Device
+  label: onScaleChanged
+  to_state: Process
+- from_state: Interface
+  label: onMouseWheel
+  to_state: Device
+- from_state: Interface
+  label: onScaleChanged
+  to_state: Device
+- from_state: MultiSite
+  label: onMouseWheel
+  to_state: Site
+- from_state: MultiSite
+  label: onScaleChanged
+  to_state: Site
+- from_state: Process
+  label: onMouseWheel
+  to_state: Device
+- from_state: Process
+  label: onScaleChanged
+  to_state: Device
+- from_state: Rack
+  label: onMouseWheel
+  to_state: Site
+- from_state: Rack
+  label: onMouseWheel
+  to_state: Device
+- from_state: Rack
+  label: onScaleChanged
+  to_state: Site
+- from_state: Rack
+  label: onScaleChanged
+  to_state: Device
+- from_state: Site
+  label: onMouseWheel
+  to_state: MultiSite
+- from_state: Site
+  label: onMouseWheel
+  to_state: Rack
+- from_state: Site
+  label: onScaleChanged
+  to_state: MultiSite
+- from_state: Site
+  label: onScaleChanged
+  to_state: Rack
+- from_state: Start
+  label: start
+  to_state: MultiSite