feat: add functions support

[leo-gall]

What kind of change does this PR introduce?

Feature

What is the current behavior?

Currently, function invocation is not supported.

What is the new behavior?

This PR adds a new method to the MockSupabaseHttpClient: you can now call the registerFunctionsResponse function, which registers a new function. As function parameters, you can specify a name and a FunctionResponse object. This function can now be called, e.g. using Supabase.instance.client.functions.invoke

[dshukertjr]

I love this PR! I did leave a comment, but overall very excited about it!

[leo-gall]

I think it is done so far, except of the documentation. Any feedback?

[dshukertjr]

@leo-gall So sorry for taking so long to come back to this one. It appears that there is an analysis issue, but could you take a look?

[leo-gall]

@leo-gall So sorry for taking so long to come back to this one. It appears that there is an analysis issue, but could you take a look?

They were failing because there was a syntax error caused by the merge conflict resolution a few days ago. I've also added documentation btw.

[leo-gall]

Do you have any feedback? Is anything missing or do you have any recommendations for the API?

[dshukertjr]

Looks great, and sorry for taking time on this one!