fix: discard optional if default is present

[ChilloManiac]

Closes #1290

[changeset-bot]

🦋 Changeset detected

Latest commit: 25a7c77

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 24 packages

Name	Type
@kubb/plugin-zod	Patch
@kubb/plugin-client	Patch
@kubb/plugin-react-query	Patch
@kubb/plugin-solid-query	Patch
@kubb/plugin-svelte-query	Patch
@kubb/plugin-swr	Patch
@kubb/plugin-vue-query	Patch
@kubb/cli	Patch
@kubb/config-biome	Patch
@kubb/config-ts	Patch
@kubb/config-tsup	Patch
@kubb/core	Patch
@kubb/fs	Patch
@kubb/oas	Patch
@kubb/parser-ts	Patch
@kubb/plugin-faker	Patch
@kubb/plugin-msw	Patch
@kubb/plugin-oas	Patch
@kubb/plugin-redoc	Patch
@kubb/plugin-ts	Patch
@kubb/react	Patch
@kubb/types	Patch
kubb	Patch
unplugin-kubb	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[ChilloManiac]

Looked through the typechecking, but can't figure out why errors would show up in vue and react query here 🤷‍♂️