Adds acceptance doc for networking UI

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

docs/networking/rack.yml

@@ -0,0 +1,83 @@
+diagram_id: 65
+finite_state_machine_id: 6
+name: rack_fsm
+states:
+- id: 9
+  label: ContextMenu
+  x: 898
+  y: 1016
+- id: 2
+  label: Disable
+  x: 760
+  y: 468
+- id: 7
+  label: EditLabel
+  x: 600
+  y: 934
+- id: 8
+  label: Move
+  x: -69
+  y: 861
+- id: 1
+  label: Ready
+  x: 532
+  y: 560
+- id: 4
+  label: Selected1
+  x: 214
+  y: 566
+- id: 5
+  label: Selected2
+  x: 220
+  y: 810
+- id: 6
+  label: Selected3
+  x: 249
+  y: 1047
+- id: 3
+  label: Start
+  x: 582
+  y: 334
+transitions:
+- from_state: ContextMenu
+  label: onLabelEdit
+  to_state: EditLabel
+- from_state: ContextMenu
+  label: onMouseDown
+  to_state: Ready
+- from_state: EditLabel
+  label: onKeyDown
+  to_state: Selected2
+- from_state: EditLabel
+  label: onMouseDown
+  to_state: Ready
+- from_state: Move
+  label: onMouseUp
+  to_state: Selected2
+- from_state: Ready
+  label: onMouseDown
+  to_state: Selected1
+- from_state: Selected1
+  label: onMouseMove
+  to_state: Move
+- from_state: Selected1
+  label: onMouseUp
+  to_state: Selected2
+- from_state: Selected2
+  label: onKeyDown
+  to_state: Ready
+- from_state: Selected2
+  label: onMouseDown
+  to_state: Ready
+- from_state: Selected2
+  label: onMouseDown
+  to_state: Selected3
+- from_state: Selected3
+  label: onMouseMove
+  to_state: Move
+- from_state: Selected3
+  label: onMouseUp
+  to_state: ContextMenu
+- from_state: Start
+  label: start
+  to_state: Ready