[FEATURE] Show dependencies tree for OSS Index

[guillermo-varela]

• What are you trying to do? Based on the old OSS Index Gradle plugin, the output might be more readable if the dependencies are shown in a tree structure instead of the current plain format, specially for projects with a long list of dependencies and vulnerabilities found: https://github.com/sonatype-nexus-community/ossindex-gradle-plugin#dependency-tree-of-vulnerabilities