Franknoirot/live system theme (#358)

* Only show the Replay Onboarding button in file settings
Resolves #351. Eventually we will implement more sophisticated
logic for which settings should be shown where.

Signed-off-by: Frank Noirot <frank@kittycad.io>

* Remove unnecessary console.log

Signed-off-by: Frank Noirot <frank@kittycad.io>

* Respond to system theme changes in real-time
If the user has their "theme" setting to "system".
I tried to use the [XState invoked callback approach](https://xstate.js.org/docs/guides/communication.html#invoking-callbacks),
but I could not find any way to respond to the latest context/state values within the
media listener; I kept receiving stale state.

Signed-off-by: Frank Noirot <frank@kittycad.io>

---------

Signed-off-by: Frank Noirot <frank@kittycad.io>

src/lib/commands.ts

@@ -73,8 +73,6 @@ export function createMachineCommand<T extends AnyStateMachine>({
         arg.defaultValue as keyof typeof state.context
       ] as string | undefined
 
-      console.log(arg.name, { defaultValueFromContext })
-
       const options =
         arg.options instanceof Array
           ? arg.options.map((o) => ({