Documentation of AEM Application Format

[kwin]

Some documentation on the module structure format of "aemapp" packaging which can be processed with package-app mojo (https://github.com/adobe/aemanalyser-maven-plugin/blob/main/aemanalyser-maven-plugin/src/main/java/com/adobe/aem/analyser/mojos/PackageAppMojo.java) would be really helpful. Particularly interesting are answers for the following questions:

1. Is the mojo only necessary to deploy to the AEM SDK locally (in order to allow deployments via the package manager ReST API) or initially also required for Cloud deployments?
2. Is the package-app mojo only a temporary solution and direct deployment of those "jar" packagings are supported by some OSGi installer factory or some other means natively in the future?
3. Can a sample Maven module outlining the features of the AEM application JAR be provided?
4. Are nested AEM application Jars supported (similar to nesting FileVault Container Content Packages)?
5. Which Maven plugin supports packaging aemapp?