Need a linkable license page on jetty.org

[joakime]

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.

[jmcc0nn3ll]

Give me the list of what should be what, and I'll build the page.

[jmcc0nn3ll]

@joakime ^^