Enhance build: Add ant tasks for creating 2 xars in dev and prod and for handling the replication triggers

[plutonik-a]

Build env. specific xars, with and without triggers:

• default ant task ant: create 1 default xar without (replication) triggers
• ant task ant xar-dev will create 2 xar files, one with and one without triggers, the triggers will contain the dev environment variables
• ant task ant xar-prod will create 2 xar files, one with and without triggers, the triggers will contain the prod environment variables
• extract configuration from expath-pgk.xml to `build.properties.xml
• update readme with build documentation

[github-actions[bot]]

:tada: This PR is included in version 0.5.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: