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).