This PR adds settings for hiding title (breadcrumbs) from the terminal
toolbar. If the title is hidden, the toolbar disappears completely.
Example:
```json
"terminal": {
"toolbar": {
"title": true,
}
}
```
[The PR that added the "toolbar"
setting](https://github.com/zed-industries/zed/pull/7338) didn't affect
toolbars of the terminals that are placed in the editor pane. This PR
fixes that.
Release Notes:
- Added support for configuring the terminal toolbar ([8125](https://github.com/zed-industries/zed/issues/8125))
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