feat: add named slots

[prevwong]

Closes #162

This PR adds support to define named slots within a Reka component:

component Card() => (
  <div>
    <slot @name="top" />
   <div>
      <slot />
   </div>
 </div>
)

component App() => (
   <Card>
      <div @slot="top">
         <text value={"Card header"} />
      </div>
      <text value={"Card children"} />
  </Card>
)

This is equivalent to passing React elements as props:

type CardProps = {
  children: React.ReactNode; // slot with no name
  top: React.ReactNode;  // slot with the name "top"
}

const Card = (props: CardProps) => {...}

Named slots may also be useful to support LinkedNodes which currently exists in Craft.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 2eb013c6649d1bc9ccc1131d0a64c0c6b4173a9e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

| Name | Type | | -------------- | ----- | | @rekajs/parser | Patch | | @rekajs/types | Patch | | @rekajs/core | Patch |

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Name	Status	Preview	Updated (UTC)
reka	✅ Ready (Inspect)	Visit Preview	Jun 17, 2024 0:43am