Replace the padding horizontal in segmented buttons. The padding is too big here. Or please enable the user to control the padding

Hi! 👋

Firstly, thanks for your work on this project! 🙂

Today I used [patch-package](https://github.com/ds300/patch-package) to patch `react-native-paper@5.12.5` for the project I'm working on.

Here is the diff that solved my problem:

```diff
diff --git a/node_modules/react-native-paper/src/components/SegmentedButtons/SegmentedButtonItem.tsx b/node_modules/react-native-paper/src/components/SegmentedButtons/SegmentedButtonItem.tsx
index d88f2a4..fa41ada 100644
--- a/node_modules/react-native-paper/src/components/SegmentedButtons/SegmentedButtonItem.tsx
+++ b/node_modules/react-native-paper/src/components/SegmentedButtons/SegmentedButtonItem.tsx
@@ -262,7 +262,7 @@ const styles = StyleSheet.create({
alignItems: 'center',
justifyContent: 'center',
paddingVertical: 9,
- paddingHorizontal: 16,
+ paddingHorizontal: 6,
},
});

```

This issue body was [partially generated by patch-package](https://github.com/ds300/patch-package/issues/296).

从 src/components/SegmentedButtons/SegmentedButtonItem.tsx 中分段按钮项的样式及其 paddingHorizontal 值开始。检查该组件目前如何提供样式设置或自定义，然后实现所请求的更小水平内边距，或让用户能够控制它。完成标准是分段按钮不再强制使用所报告的过大间距。

由索引模型根据 Issue 内容生成。