Add xsd schemas on wildlfy.org

we should have all wildfly releated schemas to wildfly.org/schema.

As part of this task, we need to update all docs to point to new URL.
have as much automated as possible process for uploading new schemas when new releases is done.
consolidate this over various (sub)projects that provide schemas that should be here.

What is not expected to be done is to host all old schemas that have nothing do do with WildFly on new location.
Example are most of pre AS7 jboss specific descriptors that WildFly no longer honors.