[DXP-973] Add Maven project to generate single AEM package containing resources for StreamX tutorials

[otto-nagy-ds]

This PR introduces the following changes:

• Add new folder integrate-aem-with-streamx-howto to serve as a root for a self-buildable Maven project containing StreamX resources for AEM tutorials
• Add config files for Maven Wrapper (3.9.6)
• Add Maven project config to generate a single, deployable all AEM package containing
  • StreamX AEM connector OSGi bundle and its dependencies
  • OSGi config for StreamX connector with entries applicable for tutorials
• Add README.md with instructions to build the package from sources