Apache Karaf OSGi feature file support

Apache Karaf delegates its dependency information to feature files to support enhanced functionality, such as supporting multiple versions of the same artifact. It would be useful if these dependencies could be captured into the BOM as well.

Start by investigating how the Maven plugin currently collects dependencies and assembles the BOM, then compare that flow with Apache Karaf feature files. Done means dependencies declared through those feature files are captured in the generated BOM, with coverage verified by appropriate project tests.

Written by the indexing model from the issue text.