Add ability to emit usage info from modules on load

Author: rastating

lib/cli/modules.rb

@@ -27,6 +27,7 @@ def use(module_path)
         mod = context.load_module(module_path)
         mod.event_emitter.subscribe(self)
         print_good "Loaded module: #{mod}"
+        mod.emit_usage_info
         @context_stack.push(context)
       rescue StandardError => e
         print_bad "Failed to load module: #{e}"

lib/wpxf/core/module_info.rb

@@ -50,5 +50,10 @@ def module_date
     def module_description_preformatted
       @info[:desc_preformatted]
     end
+
+    # Emits any information that the user should be aware of before using the module.
+    def emit_usage_info
+      nil
+    end
   end
 end