Describe the problem

The current SvelteKit Reroute functionality doesn't support dynamic rerouting for localization where settings are stored in a database. We need to implement a multi-domain, multi-prefix localization system that allows flexible domain/language combinations.

Example configuration:

• Domains: example.com, example.uk, example.gr, example.fr
• Localizations: en-gb, el-gr, en-gr, fr-fr, en-fr

Domain/prefix mappings:

el-gr:
- example.com/el-gr/
- example.gr/

en-gr:
- example.com/en-gr/
- example.gr/en/

en-gb:
- example.com/
- example.uk/

Describe the proposed solution

Modify the Reroute function to return MaybePromise<void | string> and update its implementation in server/response.js and client/client.js.

A proof-of-concept implementation: nikosgram@70d808e

I would appreciate feedback on this approach to ensure I'm not overlooking any potential issues or better alternatives.

Alternatives considered

No response

Importance

i cannot use SvelteKit without it

Additional Information

No response