Allow adding dependencies to dependencyManagement

[Riduidel]

The pom add command currently adds direct dependencies. It would be a nice thing to be able to add dependencies in dependencyManagement.

[Riduidel]

Wait, it seems like when I add a dependency both in parent and child, dependencies are moved to dependencyManagement ? That's cool!

[andirady]

I'm bad at writing sentences, but here's how it works:

1. when the project is packaged as "pom", dependencies will be added to the dependencyManagement
2. when the project is a submodule, the dependency will be added directly to the pom but with the version omitted if the dependency is managed by either the parent or one of the imported dependency in the dependencyManagement
3. when the dependency has import scope and of type pom, it'll be always be added to dependencyManagement.

[Riduidel]

This should be added to readme ;-), want some PR ?

[andirady]

This should be added to readme ;-), want some PR ?

PR is always welcomed. 😁