Add [x]OrThrow methods

[wyozi]

Adds some shortcut methods to get data/count from a Supabase query. I've added these helpers to a couple of codebases and have found them very useful, so I think they would be useful to have in the library itself as well.

[mmkal]

Somewhat related #494 - although I think both could be useful together. The only difference #494 would make to this is that you'd no longer need the !.

[mandarini]

Hi @wyozi ! Thanks for the contribution and your patience.

This repository is deprecated and has moved to the new Supabase JS monorepo. Since this PR has been inactive for over a year, I’m going to close it to keep the old repo tidy, before archiving.

If you believe this change is still needed, please open a new PR in the monorepo and include a link back to this thread for context:

• Monorepo: https://github.com/supabase/supabase-js
• Package location: packages/core//
• Migration guide: https://github.com/supabase/supabase-js/blob/master/docs/MIGRATION.md
• Contributing guide: https://github.com/supabase/supabase-js/blob/master/CONTRIBUTING.md

Note: This old repository will be archived on October 10, 2025. Thank you again for your effort and understanding!