Print plugin success messages + print plugin location on load (#267)

* report plugin state if succeed

We havbe a state field in the plugin response that its not being used
for anything. This patch makes luet print the state reported from the
plugin if its not empty as a way for plugins to report data on success
to users. If the field is empty it will be ignored.

Signed-off-by: Itxaka <igarcia@suse.com>

* Print plugin path

This patch adds the plugin location to the printed plugin list for a
more rich view of the loaded plugins

Signed-off-by: Itxaka <igarcia@suse.com>

cmd/root.go

@@ -103,7 +103,7 @@ To build a package, from a tree definition:
 		if len(bus.Manager.Plugins) != 0 {
 			util.DefaultContext.Info(":lollipop:Enabled plugins:")
 			for _, p := range bus.Manager.Plugins {
-				util.DefaultContext.Info("\t:arrow_right:", p.Name)
+				util.DefaultContext.Info(fmt.Sprintf("\t:arrow_right: %s (at %s)", p.Name, p.Executable))
 			}
 		}
 	},