Sidebar & Placeholder

In this release, the Sidebar component was added to the components section.

Thanks to this issue here #32, I saw that shadcn-ui added a Sidebar component to their library.

The guys at shadcn-vue had already created a port of this, so I used most of that code to create the Sidebar component.

Thanks to all the great devs that made this component possible ❤️.

As for the Placeholder component, this one was taken from the guys at Nuxt UI 🙏.