Support for multi-module projects

[kathrynkodama]

Improve detection of multi-module projects, and consider a tree parent/child view in the dashboard for multiple modules.

Should cover both Maven and Gradle projects.

#61 is related.

[andre-doherty]

Hello
Totally agree, it would be too bad that the maven multi-modules support introduced with the 3.4 version of the maven plugin would be left aside.
Do you have a idea when the vs-code plugin will support that ?

[kathrynkodama]

@andre-doherty thanks for the feedback! This feature is on the roadmap for the next release, but we cannot provide a timeline for when that will be available.

[kathrynkodama]

As part of this issue, consider a way to properly display the "View test report" actions so that test reports for each individual module are easily displayed to the user.

Edit: Comes from this Slack thread - https://ibm-cloud.slack.com/archives/CJ6U2DWPJ/p1642012398006200

[kathrynkodama]

Team has decided that for multi-module projects, display only the root level pom.xml in the Liberty dashboard view and assume dev mode can figure out which sub module has the correct Liberty configuration (otherwise users would have to start dev mode with custom params, start... action, with the -pl <liberty-module> -am tags

cc: @travis1111