Handling of `<template>` elements

[lowlighter]

Scope

for

What do you want to define?

mizu should treats <template> as a group block, similarly to how v-for handles it

Example usage

<template *for="2">
  <p></p>
  <p></p>
</template>

The complexity probably comes from tracking generated elements (since we don't have a vdom and we don't really want to)

It is also unclears if $generated from *empty should count it as a single generated element or not

Needs to interacts nicely with #37

I have searched for existing issues

Yes