Add Unwrap (browser-based explorer for CSV/JSON/Excel/ZIP exports) (#385)

* Add Unwrap (browser-based explorer for CSV/JSON/Excel/ZIP exports)

Adds Unwrap to Data Exploration & Visualization > Free (Proprietary / Source-Available).

Unwrap is a browser tool for opening unfamiliar data exports (CSV, JSON, Excel, ZIP archives). Files are parsed and profiled locally; DuckDB runs in the browser as the in-memory workspace for detected tables, so nothing is uploaded.

Disclosure: I built Unwrap. It is free to use, not open source.

Privacy / processing details: https://unwrap.tools/privacy/

* Fix formatting issue in Unwrap entry in README

README.md

@@ -155,6 +155,7 @@ DuckDB 2.0.0 was released on 2026-10-21: see the [announcement blog post](https:
 - [Datakit](https://datakit.page/) - The privacy-first data analysis toolkit. (proprietary; free tier)
 - [Kavla](https://kavla.dev/) - A collaborative data analysis tool. (proprietary; free to use)
 - [OpenSheet](https://opensheet.app) - Spreadsheet-style data tool with visual canvas, inline editing, and AI commands for SQL transformations. (proprietary; free to use)
+- [Unwrap](https://unwrap.tools/) - Opens unfamiliar CSV, JSON, Excel and ZIP exports in the browser and profiles them locally in an in-memory DuckDB workspace (WebAssembly); file contents are never uploaded. (proprietary; free to use)
 
 ### ETL, Pipelines & Orchestration