fix: clone util should clone symbol properties of object

[Copilot]

The clone function only iterated over string-keyed properties via for...in, missing symbol properties entirely.

Changes

• Added Object.getOwnPropertySymbols() iteration to clone symbol-keyed properties
• Added test case for nested symbol property cloning

Example

const sym = Symbol('test')
const obj = { a: 1, [sym]: { b: 2 } }
const cloned = clone(obj)

// Before: cloned[sym] was undefined
// After: cloned[sym] equals { b: 2 } (deep cloned)

Original prompt

clone util should clone symbol properties of object

if (isObject(value)) {
const result: Record<PropertyKey, unknown> = {}

for (const key in value) {
  result[key] = clone(value[key])
}

return result as any

}

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commit: 9d0d396