Add support for Svelte 5 and Runes

[vishalbalaji]

Resolves #57

This branch of TanStack/query is working on adding support for Svelte 5 and rune-based reactivity. This issue will track a separate branch and PR to keep this library in sync with the svelte-5-adapter branch until it is merged in.

[fnimick]

@vishalbalaji with store-based reactivity it appears to work fine with svelte 5 as is - can you add this to your peer deps so we don't have to use --force for our npm commands for now?

[vishalbalaji]

@fnimick Thank you for letting me know, I've pushed this change with v2.3.15.