Feature request: Left and Right icon element

Great library, I think it will be nice to have a functionality to supply the left and right element to the input field.

The API could be similar to `react-native-paper's` text input

```
<InputOutline
  left={<Icon />}
  right={<Icon />}
/>

```

may be we have to add another prop called `continer-style`.

Would like to hear thoughts from maintainers.