### TL;DR
refactor: rename settings, indexer embedding -> embedding
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## Summary by CodeRabbit
- **Refactor**
- Unified naming in workspace settings from "Indexer & Embedding" to "Embedding" for improved clarity.
- Updated sidebar labels, tab keys, and test IDs to reflect the new naming convention.
- Streamlined the layout and organization of the embedding settings interface for a more consistent user experience.
- Simplified the export and component structure for embedding settings.
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