fix(plugin-zod): keep an array default as an array literal

[xeoneux]

Fixes the array case in formatDefault, so a default: [] reached through a $ref no longer
becomes .default({}).

formatDefault branched on typeof value === 'object', which is also true for an array, so []
took the object path and returned '{}'. defaultLiteral only guarded this for nodes that narrow
to array, and a property referencing an array schema is a ref node, so it fell through and
produced z.array(...).default({}) — a schema that does not typecheck (TS2769).

Arrays are now handled before the object case:

export function formatDefault(value: unknown): string {
  if (typeof value === 'string') return stringify(value)
  // An array is also `typeof 'object'`, so it has to be handled before the object case.
  if (Array.isArray(value)) return JSON.stringify(value)
  if (typeof value === 'object' && value !== null) return '{}'

  return String(value ?? '')
}

Before / after for a property referencing an array schema:

- resources: resourcesSchema.optional().default({})
+ resources: resourcesSchema.optional().default([])

The fix is in formatDefault rather than defaultLiteral so it also covers any other path that
reaches the value without a narrowed array node. Plain objects still collapse to {}, unchanged.

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🦋 Changeset detected

Latest commit: 8bc5aa3

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

This PR includes changesets to release 1 package

Name	Type
@kubb/plugin-zod	Patch

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[xeoneux]

Fixes #803

[stijnvanhulle]

@all-contributors please add @xeoneux for code

[allcontributors]

@stijnvanhulle

I've put up a pull request to add @xeoneux! 🎉