fix: server$ error handling

[DustinJSilk]

What is it?

• Bug

Description

This fixes a few issues with server$ error handling

• 4xx ServerErrors are returning a a value instead of throwing an error on the frontend
• server$ middleware could not catch errors - the server$ function would simply exit early. [🐞] server$ middleware cannot catch errors #7183
• You can now also throw a ServerError in a routeLoader$ to change the status code and return some serialised data. This is simply an added bonus but should pave the way for more standardised errors across loaders, actions, and server$ functions

Checklist

• My code follows the developer guidelines of this project
• I performed a self-review of my own code
• I added a changeset with pnpm change <--- this doesn't work?
• I made corresponding changes to the Qwik docs
• I added new tests to cover the fix / functionality

[changeset-bot]

⚠️ No Changeset found

Latest commit: 8c01bb5

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[DustinJSilk]

I get this error when running pnpm change: Failed to find where HEAD diverged from origin/upcoming. Does origin/upcoming exist?

[DustinJSilk]

I would add a fix for this: #7165, but i have no idea how to fix it.

[DustinJSilk]

@wmertens fyi - returning errors as values was intentional in this PR: #6290.
I dont think this was the right decision, as it becomes really difficult to work with. Now, errors behave like javascript errors and the user can catch them and use a type guard on the data instead.

[DustinJSilk]

@shairez any chance we can get this PR reviewed?