vue3: rendering slots if are set and passed from controls

[chakAs3]

Issue:

What I did

currently, the slots are not rendered even though they are detected in the controls and set which is unexpected behaviour
So I added code to be rendered if the component has slots and the user passe slot value via the controls

How to test

using the vue3-vite/default-ts. add slots to the Button.vue

the slots will be detected on the control so you can set these values to see them rendered on the component

• Is this testable with Jest or Chromatic screenshots?
• Does this need a new example in the kitchen sink apps?
• Does this need an update to the documentation?

If your answer is yes to any of these, please make sure to include it in your PR.