Move and update the F# Core Library Reference to the new docs site

[CameronAavik]

Is your feature request related to a problem? Please describe.
Currently the only documentation on how to use the F# Core API can be found on the old docs website here. In addition, this is the site that is referenced on the F# Guide.

The content on this site has been frozen and is not open to receiving updates and fixes. In addition, there is a lot missing from this site and so it is not a very useful reference any more.

Describe the solution you'd like
The content from this site should be migrated somewhere in the new docs site, such as a subcategory under the F# Language Reference or in the .NET API Browser. This option means that the community is able to update all the missing functions and new developers to F# can see examples of how these functions are used.

The source code for F# Core is already very documented, so I would imagine that the majority of these docs could be auto-generated.

I would also be personally willing to contribute to this documentation with example code if I had a place to update it, but at the moment there is nowhere for me to do so.

Describe alternatives you've considered
As mentioned, the F# Core source on Github has good documentation and so people could browse the source code to determine how to use the API (this is how I explore the API today). But it's not a great user experience, it's not very discoverable especially on Google, and it doesn't contain example usages which I find is the most useful part of using the .NET API Browser.

[welcome]

Thank you for creating the issue! One of our team members will get back to you shortly with additional information.

[ryanmajidi]

@dend Can you take a look at this issue?

[cartermp]

Not sure why I was assigned here. The problem is that the docs API reference can only auto-generate things; otherwise this would have been taken care of long ago.

[aggieben]

Any prospect for this happening in the near future?

[baronfel]

For those that find this issue before it's resolved: I've auto-generated docs for FSharp.Core 4.7.0 and hosted them here: https://baronfel.github.io/fsharp-core-api-docs/.

[cartermp]

This is in progress: dotnet/docs#17004

[aggieben]

Still in progress? #2536 (comment)

[baronfel]

The main tracking issue now seems to be dotnet/docs#17199

[hickford]

Community docs link https://fsharp.github.io/fsharp-core-docs/