Describe the use of container props

[mrleblanc101]

There is no explanation of what it does and how it work:
https://floating-vue.starpad.dev/api/#container

v-tooltip v2 had container: false documented, but it's not documented anymore (#368)
https://floating-vue.starpad.dev/legacy/v2/#other-options

Also, it would be nice to add an example or a mention of custom container like: container: '#myButton'

[mrleblanc101]

In my case, I wanted the tooltip to be inside the element it's binded to, using container: false would put the tooltip inside the parent.

<UButton
    id="emergencyStop"
    v-tooltip.bottom="{
        content:
            'Watch the antenna closely during the alignment. Use the emergency stop to prevent the antenna from colliding with an external object.',
        theme: 'danger',
        popperClass: 'max-w-[25rem] w-[25rem] text-base text-left font-normal',
        triggers: [],
        shown: true,
        container: '#emergencyStop',
    }"
/>

Relates to #1075