Support marked text for international text input

### Describe the solution you'd like?

```shell
Warp should show the marked text for IME. For example, when typing option-E into the input, instead of not rendering anything, we should render a `´` character with underscore to indicate what the user has just typed.
```


### Is your feature request related to a problem? Please describe.

_No response_

### Additional context

_No response_