Need a linkable license page on jetty.org

We we need a similar link to https://www.eclipse.org/jetty/licenses.php

Since we have a variety of licenses, depending on Jetty version, and even what we are making available, it shouldn't be a page with a single license declaration.
But rather something like ...

For jetty client we have license ____ and ___
For jetty server we have licenses ____ and ____
For jetty reactive client we have licesnes ____ and ____
For jetty ALPN we have licenses ____ and ___

See LICENSE.txt and NOTICE.txt in respective projects for more details. (or something like that)

We should mention the `SPDX-License-Identifier` as well.