Make command bar arguments skippable, configure Extrude selection to be skippable (#1353)

* Make commands able to be configured as 'skippable'

* Make command machine able to skip arguments

* Add support for skippable selections, which are not known until within input component

* Update extrude command config to skippable

* Use defaultValue to seed initial arg values, not payload

* Remove unused `payload` command config prop

* Make skip and defaultValue types more exact

* Remove console logs

* fmt

* Revert type tightening, not worth the headache

src/lib/createMachineCommand.ts

@@ -115,7 +115,7 @@ function buildCommandArgument<
   const baseCommandArgument = {
     description: arg.description,
     required: arg.required,
-    payload: arg.payload,
+    skip: arg.skip,
     defaultValue:
       arg.defaultValue instanceof Function
         ? arg.defaultValue(state.context)