Namespace with `declare`d members should not be type only

[nayeemrmn]

Describe the bug

A namespace with only declared values is treated as type-only and elided at transpilation, it should be transpiled to an empty namespace.

Input code

export namespace foo {
  export declare const bar: number;
}

Config

No response

Playground link

https://play.swc.rs/?version=1.2.212&code=H4sIAAAAAAAAA0utKMgvKlHIS8xNLS5ITE5VSMvPV6jmUlBIhUikpCbnJBalKiTn5xWXKCQlFlkp5JXmJqUWWXPVAgDtD19xPAAAAA%3D%3D&config=H4sIAAAAAAAAA0WOSwrDMAxE76J1Fm0XhfoOPYRwleDgH5ICNcZ3r21SshtmRk9TYRcLpkJGFuKhpETFLxjQkkksu6ywgEq3lA9qXSNvpL1B8rjdXz31KQmBWdELLRBcdGsZLJtCZhK5Ioyb%2FzdbZ4X0OYZR57vJfEK7GOedk%2FdZnBt%2BJYyKhrcAAAA%3D

Expected behavior

TSC output:

export var foo;
(function (foo) {
})(foo || (foo = {}));

https://www.typescriptlang.org/play?#code/KYDwDg9gTgLgBAOwIYFtgGcxIMbDgMwgjgG8AoOOUSWOAE2GwBsko9sIF14AjVgLkQBXFD2BQA3GQC+ZIA

Actual behavior

Produces empty module.

Version

swc_ecma_parser 0.111.0, swc_ecma_transforms_typescript 0.137.0

Additional context

No response

[swc-bot]

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