Enhance build file: 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/or 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 one 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 1.0.0 :tada:

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