Svelte 5 :allow pass snippet to parent with export

[zhihengGet]

Describe the problem

since we allow $derived to be exported i think we can allow snippet to be export too

<script>
	let count = $state(0);

	function increment() {
		count += 1;
	}
	export {T}
</script>

{#snippet T()}
	<span>hi</span>
{/snippet}

Describe the proposed solution

Importance

would make my life easier

[rmunn]

What's the use case here? What does this allow you to do that's easier than making <span>hi</span> a component?

Simple examples/reproductions are good, but this one might be a little too simple right now, as it's not yet clear why this would be helpful.

[zhihengGet]

better DX imo

the main reason is we can allow parent component to place the snippet wherever he/she likes which means flexibility and child component can be self-contained with sharing states.

without this, i have to create multiple components, and one global $state that share the state or pass rune around which can be not fun

i.e have a dialog component, and i want to allow user to render the 'x' close button, with snippet, i can create it inside dialog and allow user to place where he pleases, even better since snippet have access to the open $state runes, parent component can just use this 'x' button to control the child ( might be a bad example but i hope u get it)

[dummdidumm]

Closing as duplicate of #10350