Add workflows option definition

Bug: twpowertools:74

Change-Id: I923966a40493496ecc006e0c2fcde2ecf823b807
diff --git a/src/common/optionsPrototype.json5 b/src/common/optionsPrototype.json5
index 824b754..ca38042 100644
--- a/src/common/optionsPrototype.json5
+++ b/src/common/optionsPrototype.json5
@@ -121,6 +121,11 @@
   // #!endif
 
   // Experiments:
+  'workflows': {
+    defaultValue: false,
+    context: 'experiments',
+    killSwitchType: 'experiment',
+  },
 
   // Internal options:
   'ccdarktheme_switch_enabled': {