📚 Documentation: Update tutorial documentation for svelteKit tutorials to svelte 5

[blockfl0w]

💭 Description

The current documentation for the sveltekit tutorials Build an ideas tracker with svelteKit and Server-side authentication with SvelteKit contain out of date CLI commands and out dated code not taking advantadge of svelte 5 runes.

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct