CLI add-package with source code

[hikalkan]

Add with-source-code option to abp add-package command, so we may add source code of a package into the solution and remove the package dependency. This has some conditions, however;

• The package should be directly added to the solution. It can't be a indirect package reference (otherwise we have error, because we have the source code and project dependency for the same package and they conflict on build). This is responsibility of the developer because we can't resolve the dependency graph to determine indirect references.
• It can't be framework packages because of the license. Theme packages and module packages are supported.