Sync svelte docs (#922)

sync svelte docs

Co-authored-by: Rich-Harris <1162160+Rich-Harris@users.noreply.github.com>

Author: github-actions[bot]

apps/svelte.dev/content/docs/svelte/03-template-syntax/06-snippet.md

@@ -246,6 +246,23 @@ We can tighten things up further by declaring a generic, so that `data` and `row
 </script>
 ```
 
+## Exporting snippets
+
+Snippets declared at the top level of a `.svelte` file can be exported from a `<script module>` for use in other components, provided they don't reference any declarations in a non-module `<script>` (whether directly or indirectly, via other snippets) ([demo](/playground/untitled#H4sIAAAAAAAAE3WPwY7CMAxEf8UyB1hRgdhjl13Bga8gHFJipEqtGyUGFUX5dxJUtEB3b9bYM_MckHVLWOKut50TMuC5tpbEY4GnuiGP5T6gXG0-ykLSB8vW2oW_UCNZq7Snv_Rjx0Kc4kpc-6OrrfwoVlK3uQ4CaGMgwsl1LUwXy0f54J9-KV4vf20cNo7YkMu22aqAz4-oOLUI9YKluDPF4h_at-hX5PFyzA1tZ84N3fGpf8YfUU6GvDumLqDKmEqCjjCHUEX4hqDTWCU5PJ6Or38c4g1cPu9tnAEAAA==)):
+
+```svelte
+<script module>
+	export { add };
+</script>
+
+{#snippet add(a, b)}
+	{a} + {b} = {a + b}
+{/snippet}
+```
+
+> [!NOTE]
+> This requires Svelte 5.5.0 or newer
+
 ## Programmatic snippets
 
 Snippets can be created programmatically with the [`createRawSnippet`](svelte#createRawSnippet) API. This is intended for advanced use cases.

apps/svelte.dev/content/docs/svelte/98-reference/.generated/compile-errors.md

@@ -400,6 +400,12 @@ Expected token %token%
 Expected whitespace
 ```
 
+### export_undefined
+
+```
+`%name%` is not defined
+```
+
 ### global_reference_invalid
 
 ```
@@ -694,6 +700,30 @@ Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migra
 Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block
 ```
 
+### snippet_invalid_export
+
+```
+An exported snippet can only reference things declared in a `<script module>`, or other exportable snippets
+```
+
+It's possible to export a snippet from a `<script module>` block, but only if it doesn't reference anything defined inside a non-module-level `<script>`. For example you can't do this...
+
+```svelte
+<script module>
+	export { greeting };
+</script>
+
+<script>
+	let message = 'hello';
+</script>
+
+{#snippet greeting(name)}
+	<p>{message} {name}!</p>
+{/snippet}
+```
+
+...because `greeting` references `message`, which is defined in the second `<script>`.
+
 ### snippet_invalid_rest_parameter
 
 ```

apps/svelte.dev/content/docs/svelte/98-reference/30-compiler-errors.md

@@ -404,6 +404,12 @@ Expected token %token%
 Expected whitespace
 ```
 
+### export_undefined
+
+```
+`%name%` is not defined
+```
+
 ### global_reference_invalid
 
 ```
@@ -698,6 +704,30 @@ Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migra
 Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block
 ```
 
+### snippet_invalid_export
+
+```
+An exported snippet can only reference things declared in a `<script module>`, or other exportable snippets
+```
+
+It's possible to export a snippet from a `<script module>` block, but only if it doesn't reference anything defined inside a non-module-level `<script>`. For example you can't do this...
+
+```svelte
+<script module>
+	export { greeting };
+</script>
+
+<script>
+	let message = 'hello';
+</script>
+
+{#snippet greeting(name)}
+	<p>{message} {name}!</p>
+{/snippet}
+```
+
+...because `greeting` references `message`, which is defined in the second `<script>`.
+
 ### snippet_invalid_rest_parameter
 
 ```