New I-D: api-catalog (a well-known URI to help discovery of APIs)

[cportele]

The following proposal has been adopted by the IETF HTTP API WG as an Internet-Draft:

https://www.ietf.org/archive/id/draft-ietf-httpapi-api-catalog-00.html

This document defines the "api-catalog" well-known URI. It is intended to facilitate automated discovery and usage of the APIs published by a Web host.

Such a capability is in particular relevant for servers hosting many OGC Web APIs / datasets.

[jerstlouis]

In Common - Part 2, we deal with a single API.

With the definition of a collection of collection, it may be possible to identify multiple datasets served from the same API by tagging a root collection with some "dataset root" property.

Other than this, further "landing page of langing page" concept is probably beyond the scope of Part 2, but we could define something later based on this IETF API catalog concept.

(somewhat related to #11 and #298).