perf(core): improve binary size with api enum serde refactor

[lucasfernog]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe: performance improvement

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

This was discussed with @chippers and @JonasKruckenberg

[lucasfernog]

Basically this changes the allowlist error message from the runtime to the deserialization step. The binary is 200KB smaller now (release build, stripped).

[lucasfernog]

I'll merge this to a feature branch because there's more improvements to push.