[Feature Request] OPTICS clustering algorithm

### Description
As described in Discussion #156 there is a need for OPTICS clustering (Ordering Points To Identify the Clustering Structure) as alternative for DBSCAN.

### Pointers
See discussion #156 for further information

Hints (click to expand if you need additional pointers)

- To be able to contribute to this library you'll need
- an GitHub account
- an IDE like Visual Studio Community or Visual Studio Code
- [dotnet 6 sdk](https://dotnet.microsoft.com/en-us/download)
- to build the binaries yourself follow the [instructions](https://fslab.org/FSharp.Stats/#Installation)
- while working on the [FSharp.Stats documentation](https://fslab.org/FSharp.Stats/) (any file within https://github.com/fslaborg/FSharp.Stats/tree/developer/docs) you can navigate to the project folder with a prompt of your choice and use the command `./build watchdocs`
- unit tests can be executed via `./build runtests`