Version Packages (#18315)

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# Releases
## svelte@5.56.0

### Minor Changes

- feat: allow declarations in the template
([#18282](https://github.com/sveltejs/svelte/pull/18282))

### Patch Changes

- perf: use `createElement` instead of `createElementNS` for HTML
elements ([#18262](https://github.com/sveltejs/svelte/pull/18262))

- perf: store `current_sources` as a `Set` for O(1) membership checks
([#18278](https://github.com/sveltejs/svelte/pull/18278))

- perf: deduplicate identical hoisted templates within a component
([#18320](https://github.com/sveltejs/svelte/pull/18320))

- perf: hoist `rest_props` exclude list as a module-scope `Set`
([#18252](https://github.com/sveltejs/svelte/pull/18252))

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