* upgrade astro dependencies
* migration to Svelte 5
* Resolution of module version
* fix migrate script error
* fix migrate error comment
* fix Stylus format
* add intellisense for typescript
* Upgrading astrojs/svelte and svelte, and organizing dependencies
* Delete the incorrect settings.
* upgrade astro
* Fixed an error that occurred due to svelte.config.ts using unsupported features.
Katsuyuki Karasawa