This reverts commit 8cb0beeecc.
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## Summary by CodeRabbit
- **New Features**
- Introduced `HeaderEditorSwitcher` and `HeaderDropdown` components for
enhanced UI interactions.
- **Bug Fixes**
- Updated import paths for `IDE_HEADER_HEIGHT` across multiple
components to ensure consistent styling.
- **Refactor**
- Renamed and restructured components for clarity and improved
functionality, including `HeaderTitle` and `IDEHeaderSwitcher`.
- **Tests**
- Added tests for the `HeaderDropdown` component to validate rendering
and functionality.
- **Chores**
- Removed deprecated components and files to streamline the codebase.
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