Improve composition

[sduduzog]

This PR introduces a couple of helping composables for Vue3 and Vue2+composition-api, namely:

• useSupabase
• useSupabaseAuth
• useSupabaseStorage

Adds type declarations which solves the issue supabase-community/nuxt-supabase#11 for vue projects using vue-class-components, inevitably nuxt projects too

Adds easily configurable example projects for Vue2 and Vue3 enabling anyone to quickly play around with the plugin

It also adds configuration setup for eslint and prettier for basic linting and code formatting

TODO

• Create test project on supabase.io for testing on different project setups
• Create a repository for testing Vue2 + composition api applications
• Create a repository for testing Vue3 + vite applications

Note
The examples added to the project are not at all perfect, but they get the job done. They provided me with the quickest way to test changes added to this PR. Also, they aren't and shouldn't be set in stone. if there's a better way to achieve such a task, we should go for it.

[sduduzog]

@scottrobertson I'm interested on your take on the example projects I included

[florian-lefebvre]

Lgtm

[scottrobertson]

Looks good to me.

Not a fan of example projects as we need to keep it up to date, but I think it's simple enough.

Thanks for this!

[scottrobertson]

@sduduzog can you merge these, or do you want me to?

[sduduzog]

@scottrobertson Please do, I actually don't have write access (hopefully yet)

[scottrobertson]

Oh I thought you did. I asked @kiwicopple to give you it.

[scottrobertson]

@sduduzog to trigger a release, do another PR with the version bumped, then I can merge and click release :)