feat: improve functions error messages

[jackiewmacharia]

Summary

Extends Improve Function Error Messages to CLI.

This PR adds a template for use when parsing errors from functions:

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[github-actions]

📊 Benchmark results

Comparing with 92d621b

Package size: 380 MB

(no change)

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• T-30 (92d621b): 380 MB
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• T-1 (f87d9e6): 380 MB
• T (current commit): 380 MB

[minivan]

I'm curious how this fares with functions that are invoked by clients that don't accept HTML. If it works, can we add a test case for that?

[eduardoboucas]

Looks good in general — great job!

I left some comments. Btw, if you're wondering about the sand/boulder prefixes, it refers to our feedback ladder.

[jackiewmacharia]

I'm curious how this fares with functions that are invoked by clients that don't accept HTML. If it works, can we add a test case for that?

@minivan I've changed it to revert to the original error format if client does not accept HTML. Behaviour before this change, using curl and API client, pasted the entire template out.

Current behaviour:

[eduardoboucas]

🚀