feat(start): data guard when sending binary data to GET server functions

[nikolovlazar]

Implementing a data guard that checks if the data we're sending to a GET server function contains binary data (unserializable in query params).

👆 Video walkthrough

This PR covers two scenarios:

• When we're sending binary data to a GET server function (lines 40-44)
• When we're sending binary data to a POST server function, but within a payload instead of FormData (lines 61-65)

This is my first time contributing to Start, so let me know if I'm missing anything (I didn't write tests for this behavior 😬), or if I should push the example that I showed in the video.

[schiller-manuel]

we should also prevent this at the type level I guess?

[nikolovlazar]

@schiller-manuel didn't realize we could. Could you give me some pointers?

[schiller-manuel]

this would need to cause a typescript error if the data is not serialzable as query and GET is the method.

let's ask @chorobin

[nikolovlazar]

I can't seem to figure this out 😅

[webdevcody]

this would be great! I just spent time debugging why my FormData File was becoming a string on my server action just to forget to just a POST instead of a GET