Add support for Nuxt Bridge

[Strift]

Hello,

I'm a big fan of using Supabase and Nuxt! I saw there was an open issue for Nuxt 3 Support: #14, so I'm opening a PR to try and help.

I'm fairly new to Open-Source, so I hope both the code and the explanations will be good enough for this project. Let me know if I should rewrite anything. Also, I'm still learning TypeScript, so I hope my code isn't too much trouble! 😬

What this PR brings:

• Package code rewritten in TypeScript
• Package bundling made with unbuild
• Exporting all composables available in vue-supabase
• The module adds a server middleware to set auth cookie
• The modules allows to commit a mutation or dispatch an action when the auth state changes (DX inspired by the Firebase module)
• Easy SSR implementation with the nuxtServerInit action

This package requires vue-supabase to be updated. I think it's only minor changes, you can see them detailed in this PR.

The code is largely inspired by the awesome nuxt3-supabase package by @wobsoriano. So big props to him. 👏

Things left to do

• Documentation update
• Typing declarations? (I'm not too sure how to achieve this properly, it doesn't seem to work locally.)

Testing the code
I did not add tests to the package but I did some local testing. You can test it in this demo: https://github.com/Strift/nuxt-supabase-bridge-example

Et voilà! I hope this will help. Looking forward to have your feedback.
If there are alternatives or constraints I haven't taken into consideration, please let me know. I'll be happy to update the PR as needed.

Thanks for your time!
Cheers,

[sduduzog]

@scottrobertson Approving to get it moving, I'll tweak the version code in a follow up PR

[sduduzog]

Please add the prepare script to prepare build i.e "prepare": "npm run build",

Similar to how vue-supbase is setup, without this it's impossible to test the PR by installing it as a package, see screenshot. Also there's sometimes unexpected behavior when using yarn to install the package, as typescript files are not always built during the installation process