Update Auth section in Svelte 5 documentation

[emmanueladk]

I'm learning SvelteKit and the documentation for the authentication section suggested using Lucia, but it's no longer maintained.
Could you please provide an add-on for handling such cases or a great replacement for Lucia in the next update?
For now, I have chosen to use Firebase for authentication. As they don't provide a native mechanism for SvelteKit, I will have to write a package to fit my needs.
I think it would be very beneficial to consider this.

[webJose]

My guess from what I read here is that libraries won't be made (anymore) and that you are encouraged to do the coding.