Changes `Editor::manipulate_lines` to allow line adding and removal through callback function. - Added `editor::UniqueLinesCaseSensitive` and `editor::UniqueLinesCaseInsensitive` commands ([#4831](https://github.com/zed-industries/zed/issues/4831))
Changes `Editor::manipulate_lines` to allow line adding and removal through callback function. - Added `editor::UniqueLinesCaseSensitive` and `editor::UniqueLinesCaseInsensitive` commands ([#4831](https://github.com/zed-industries/zed/issues/4831))