Better Error-Handling

[pixelmund]

Describe the bug

Currently there is no easy way to throw errors inside loaders/actions. We should probably come up with an easy to use solution.

I have something like the following in my head:

<script context="module" ssr>
  import {  NotFoundError, HttpError } from "svemix/errors"
  export const loader = () => {
    throw new NotFoundError("User not found").
    throw new HttpError("Custom Error", { status: 401 });
   }
</script>

Which we could then make use of via instanceOf

Your Example Website or App

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Steps to Reproduce the Bug or Issue

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Expected behavior

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Screenshots or Videos

No response

Platform

• OS: [e.g. macOS, Windows, Linux]
• Browser: [e.g. Chrome, Safari, Firefox]
• Version: [e.g. 91.1]

Additional context

Would make life easier