How to have a label and a placeholder on a textinput at the same time

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If you have both a `label` and a `placeholder` prop at the same time, then on initial render, the label will show but then the placeholder doesnt show until the input is focused like so:

https://github.com/callstack/react-native-paper/assets/56619430/7a23d59d-b705-461f-ab4a-43636b12b904

is there a way to have both the label and the placeholder exist at the same time even when the input isnt focused. in other words, is there a way to make the text input always look like this with the label at the top?

从 TextInput 组件的入口点及其对 label 和 placeholder props 的处理开始。重现 issue 中描述的初始未聚焦状态，然后检查现有的测试或有关 TextInput 行为的文档。当 label 保持在顶部，并且 placeholder 在聚焦前也可见，且预期行为已由测试覆盖时，即视为完成。

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