now respecting the 'appears transparent' titlebar option which is used
in the storybook crate. created for #9453

# storybook

running

```
cargo run -p storybook components/text
```

| before | after |
| ---    | ---   |
|
![image](https://github.com/zed-industries/zed/assets/1284289/88cd93de-4ca9-40d6-aa53-aa7bc65e1f5c)
|
![image](https://github.com/zed-industries/zed/assets/1284289/b3528775-219b-46b7-9f99-da5b88330fbd)
|

Release Notes:

- N/A

Co-authored-by: Mikayla Maki <mikayla@zed.dev>