docs: The future is now with qsv pro!

README.md

@@ -369,7 +369,7 @@ Luau will also serve as the backbone of a whole library of **qsv recipes** - reu
 * **Composable/Interoperable** - qsv is designed to be composable, with a focus on interoperability with other common CLI tools like 'awk', 'xargs', 'ripgrep', 'sed', etc., and with well known ETL/ELT tools like Airbyte, Airflow, Pentaho Kettle, etc. Its commands can be combined with other tools via pipes, and it supports other common file formats like JSON/JSONL, Parquet, Arrow IPC, Avro, Excel, ODS, PostgreSQL, SQLite, etc. See [File Formats](#file-formats) for more info.
 * **As Portable as Possible** - qsv is designed to be portable, with installers on several platforms with an integrated self-update mechanism. In preference order, it supports Linux, macOS and Windows. See [Installation Options](#installation-options) for more info.
 * **As Easy to Use as Possible** - qsv is designed to be easy to use. As easy-to-use that is,
- as command line interfaces go :shrug:. Its commands have numerous options but have sensible defaults. The usage text is written for a data analyst audience, not developers; and there are numerous examples in the usage text, with the tests doubling as examples as well. In the future, it will also have a Graphical User Interface (GUI).
+ as command line interfaces go :shrug:. Its commands have numerous options but have sensible defaults. The usage text is written for a data analyst audience, not developers; and there are numerous examples in the usage text, with the tests doubling as examples as well. With [qsv pro](https://qsvpro.dathere.com), it has much expanded functionality while being easier to use with its Graphical User Interface.
 * **As Secure as Possible** - qsv is designed to be secure. It has no external runtime dependencies, is [written](https://aws.amazon.com/blogs/opensource/why-aws-loves-rust-and-how-wed-like-to-help/) [in](https://msrc.microsoft.com/blog/2019/07/why-rust-for-safe-systems-programming/) [Rust](https://opensource.googleblog.com/2023/06/rust-fact-vs-fiction-5-insights-from-googles-rust-journey-2022.html), and it's codebase is automatically audited for security vulnerabilities with automated [DevSkim](https://github.com/microsoft/DevSkim#devskim), ["cargo audit"](https://rustsec.org) and [Codacy](https://app.codacy.com/gh/jqnatividad/qsv/dashboard) Github Actions workflows.  
 It uses the latest stable Rust version, with an aggressive MSRV policy and the latest version of all its dependencies.
 It has an extensive test suite with ~1,440 tests, including several [property tests](https://medium.com/criteo-engineering/introduction-to-property-based-testing-f5236229d237) which [randomly generate](https://github.com/BurntSushi/quickcheck#quickcheck) parameters for oft-used commands. It also has a [Security Policy](SECURITY.md).