Issue #3466627 by heddn: Config schema missing

Closes #3466627

config/schema/entity_workflow.schema.yml

+entity_workflow.state:
+  type: workflows.state
+  mapping:
+    locked:
+      type: boolean
+      label: Locked
+    status:
+      type: string
+      label: Status
+entity_workflow.transition:
+  type: workflows.transition
+  mapping:
+    access_callback:
+      type: string
+      label: Access callback
+    transition_log:
+      type: boolean
+      label: Transition log
+    transition_log_required:
+      type: boolean
+      label: Transition log required
+    action_link:
+      type: boolean
+      label: Action link
+
+entity_workflow.type_settings:
+  type: mapping
+  mapping:
+    entity_types:
+      type: sequence
+      label: Entity types
+      sequence:
+        type: sequence
+        label: Bundles
+        sequence:
+          type: string
+          label: Bundle ID
+    default_state:
+      type: string
+      label: Default state
+    default_transition:
+      type: string
+      label: Default transition
+    states:
+      type: sequence
+      label: States
+      orderby: key
+      sequence:
+        type: entity_workflow.state
+        label: States
+    transitions:
+      type: sequence
+      label: Transitions
+      orderby: key
+      sequence:
+        type: entity_workflow.transition
+        label: Transition
+    default_state_callback:
+      type: string
+      label: Default state callback
+      nullable: true
+    default_transition_log:
+      type: string
+      label: Default transition log
+      nullable: true