Include AEM Maintenance Task configurations in Archetype

It would be nice if the Maven Archetype would generate the AEM Maven Archetype with AEM Maintenance Task OSGi Configurations as well as Maintenance Window definitions.

These configurations should:
* Target the correct run-modes (Author) when possible. (ie. OSGi configurations places in `config.author`, the Maintenance Window context-aware configs likely are fine to deploy Author/Publish since deploying mutable content only on author requires a discrete Content package, which seems heavy-handed for something that will simply NOOP)
* Provide reasonable defaults

Start by reading the Maven Archetype generation templates and locating how AEM OSGi configurations and Maintenance Window definitions are represented. Add reasonable AEM Maintenance Task defaults, place OSGi configurations in config.author where appropriate, and verify that generated projects contain the expected Author/Publish configuration structure.

Written by the indexing model from the issue text.