fix(core): handle macro data as string in built artifacts

[junmediatek]

Adds check for string type to handle Bun macros inlined at build time.

Changes

Modified the type check to include both function and string types:

// Before
if (typeof data === 'function') {
  const json = await data()
  return JSON.parse(json) as Record<string, Provider>
}

// After  
if (typeof data === 'function' || typeof data === 'string') {
  const json = await data()
  return JSON.parse(json) as Record<string, Provider>
}

Context

When Bun macros are enabled during compilation, the data() function may be executed and inlined as a string literal in the built artifacts. The original code only checked for function type, missing the string case.

[github-actions]

Thanks for your contribution!

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Please:

1. Open an issue describing the bug/feature (if one doesn't exist)
2. Add Fixes #<number> or Closes #<number> to this PR description

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[github-actions]

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No duplicate PRs found

[junmediatek]

@rekram1-node

Cloud you help to review this PR 74fa97e

[junmediatek]

Hi @rekram1-node

Could you help to check this PR 74fa97e ?